Transportation in Plants and Circulation in Animals Online Test 10th Science Lesson 14 Questions in English

Transportation in Plants and Circulation in Animals Online Test 10th Science Lesson 14 Questions in

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Question 1
Which of the following statement is correct?
  1. Multicellular organisms possess millions of cells in their body
  2. Every cell needs a constant supply of essential substances like nutrients and oxygen to maintain life and survival
A
1 alone
B
2 alone
C
1, 2
D
None
Question 1 Explanation: 
Multicellular organisms possess millions of cells in their body. Every cell needs a constant supply of essential substances like nutrients and oxygen to maintain life and survival.
Question 2
Every cell gets its energy by the breakdown of____
A
Fats
B
Minerals
C
Vitamins
D
Glucose
Question 2 Explanation: 
Food is the only source of energy and every cell gets its energy by the breakdown of glucose. The cells utilise this energy and govern various vital activities of life.
Question 3
Water and mineral salts absorbed by the roots reach all parts of the plant through______
A
Phloem
B
Xylem
C
Both a and b
D
None
Question 3 Explanation: 
Water absorbed by the roots have to reach entire plant and the food synthesised by the leaves have to be distributed to all the parts of the plant. Water and mineral salts absorbed by the roots reach all parts of the plant through the xylem
Question 4
The bulk movement of substances through the vascular tissue is called ______
A
Transportation
B
Translocation
C
Transplantation
D
None
Question 4 Explanation: 
The food synthesised by the leaves are translocated to all parts of the plant through the phloem. The bulk movement of substances through the vascular tissue is called Translocation.
Question 5
Which of the following are transported by Circulatory system?
A
Salts
B
Hormones
C
Oxygen
D
All the above
Question 5 Explanation: 
In larger organisms, transport of nutrients, salts, oxygen, hormones and waste products around the body are performed by the ‘Circulatory system’
Question 6
Which of the following are included in circulatory system?
  1. Blood
  2. Lymph
  3. Heart
  4. Blood vessels
 
A
1, 2, 4
B
2, 3, 4
C
1, 2, 3
D
All the above
Question 6 Explanation: 
The circulatory system consists of the circulating fluids, the blood and lymph and the heart and blood vessels which form the collecting and transporting system.
Question 7
Which of the following statement is correct?
  1. The movement of molecules from a region of higher concentration to a region of their lower concentration without the utilization of energy is called diffusion
  2. It is an active process
 
A
1 alone
B
2 alone
C
1, 2
D
None
Question 7 Explanation: 
Th e movement of molecules in liquid and solids from a region of higher concentration to a region of their lower concentration without the utilization of energy is called diffusion. This is a passive process.
Question 8
Active transport is carried out by membrane bound________
A
Carbohydrates
B
Proteins
C
Minerals
D
Salts
Question 8 Explanation: 
Active transport utilizes energy to pump molecules against a concentration gradient. Active transport is carried out by membrane bound proteins
Question 9
Transport substances from a low concentration to a high concentration is called as_____ transport
A
Uphill
B
Downhill
C
Both a and b
D
None
Question 9 Explanation: 
Proteins use energy to carry substances across the cell membrane hence they are oft en referred to as pumps. These pumps can transport substances from a low concentration to a high concentration (‘uphill’ transport)
Question 10
Which of the following statement is correct?
  1. Osmosis is the movement of solvent or water molecules from the region of higher concentration to the region of lower concentrate
  2. This process is carried out till an equilibrium is reached
  3. It is active process
A
1,2
B
1,3
C
2,3
D
All the above
Question 10 Explanation: 
Osmosis is the movement of solvent or water molecules from the region of higher concentration to the region of lower concentration through a semi-permeable membrane. This process is carried out till an equilibrium is reached. Osmosis is the passive movement of water or any other solvent molecules.
Question 11
______ is a type of diffusion in which a solid absorbs water and gets swelled up
A
Imbibition
B
Plasmolysis
C
Diffusion
D
None
Question 11 Explanation: 
Imbibition is a type of diffusion in which a solid absorbs water and gets swelled up. eg. absorption of water by seeds and dry grapes. If it were not for imbibition, seedlings would not have been able to emerge out of the soil.
Question 12
Which of the following characteristics of root hairs are correct?
  1. Thin walled
  2. Slender extension of epidermal cells
A
1 alone
B
2 alone
C
Both 1 and 2
D
None
Question 12 Explanation: 
There are millions of root hairs on the tip of the root which absorb water and minerals by diffusion. Root hairs are thin walled, slender extension of epidermal cell that increase the surface area of absorption.
Question 13
Which of the following statement is correct?
  1. Once the water enters the root hairs, the concentration of water molecules in the root hair cells become more than that of the cortex
  2. Water from the root hair moves to the cortical cells by diffusion and then reaches the xylem
 
A
1 alone
B
2 alone
C
1,2
D
None
Question 13 Explanation: 
Once the water enters the root hairs, the concentration of water molecules in the root hair cells become more than that of the cortex. Thus, water from the root hair moves to the cortical cells by osmosis and then reaches the xylem. From there the water is transported to the stem and leaves.
Question 14
How many distinct pathways are there for water from root hairs to move deeper into root layers?
A
3
B
2
C
5
D
4
Question 14 Explanation: 
Water is absorbed along with minerals, by the root hairs, purely by diffusion. Once water is absorbed by the root hairs, it can move deeper into root layers by two distinct pathways: Apoplast pathway Symplast pathway
Question 15
Which of the following statement is correct?
  1. The apoplastic movement of water occurs exclusively through the intercellular spaces and the walls of the cells
  2. This movement does not dependent on the gradient
A
1 alone
B
2 alone
C
1,2
D
None
Question 15 Explanation: 
The apoplastic movement of water occurs exclusively through the intercellular spaces and the walls of the cells. Apoplastic movement does not involve crossing the cell membrane. This movement is dependent on the gradient.
Question 16
Which of the following statement is correct?
  1. In symplastic movement, the water travels through the cells i.e. their cytoplasm; intercellular movement is through the plasmodesmata
  2. Water enters the cells through the cell membrane, hence the movement is relatively slower
 
A
1 alone
B
2 alone
C
1,2
D
None
Question 16 Explanation: 
In symplastic movement, the water travels through the cells i.e. their cytoplasm; intercellular movement is through the plasmodesmata. Water enter the cells through the cell membrane, hence the movement is relatively slower. Movement is again down a potential gradient.
Question 17
Transpiration is the evaporation of water in plants through_____ in the leaves
A
Chloroplast
B
Stomata
C
Mitochondria
D
Guard cells
Question 17 Explanation: 
Transpiration is the evaporation of water in plants through stomata in the leaves. Stomata are open in the day and closed at night.
Question 18
Which of the following statement is correct?
  1. The opening and closing of the stomata is due to the change in turgidity of the guard cells.
  2. When turgidity increases within the two guard cells the stoma closes
A
1 alone
B
2 alone
C
1,2
D
None
Question 18 Explanation: 
The opening and closing of the stomata is due to the change in turgidity of the guard cells. When turgidity increases within the two guard cells the stoma open. When the guard cells lose water, it becomes flaccid and the stoma closes.
Question 19
Water evaporates from_______ cells of leaves through the open stomata
A
Epidermal
B
Mesophyll
C
Echinodermal
D
None
Question 19 Explanation: 
Water evaporates from mesophyll cells of leaves through the open stomata, this lowers water concentration in mesophyll cells.
Question 20
  • Assertion(A): As water is lost from the leaves, pressure is created at the top to pull more water from the xylem to the mesophyll cells
  • Reason(R): Transpiration pull extends up to the roots causing the roots to absorb more water from the soil to ensure continuous flow of water from the roots to the leaves.
A
Both (A) and (R) are correct, but (R) does not explain (A)
B
Both (A) and (R) are wrong
C
Both (A) and (R) are correct and (R) explains (A)
D
(A) is Correct and (R) is wrong
Question 20 Explanation: 
As a result of water loss through stomata, more water is drawn into these cells from the xylem present in the veins through the process of osmosis. As water is lost from the leaves, pressure is created at the top to pull more water from the xylem to the mesophyll cells, this process is called transpiration pull. This extends up to the roots causing the roots to absorb more water from the soil to ensure continuous flow of water from the roots to the leaves.
Question 21
Which following affects Transpiration?
  1. Humidity
  2. Light
  3. Wind speed
  4. Temperature
A
1, 2, 3
B
1, 3, 4
C
1, 2, 4
D
All the above
Question 21 Explanation: 
Transpiration is affected by several external factors such as temperature, light, humidity, and wind speed. Internal factors that affect transpiration include number and distribution of stomata, percentage of open stomata, water status of the plant, canopy structure etc.
Question 22
Which of the following are the importance of Transpiration?
  1. Creates transpirational pull for transport of water
  2. Cools the surface of the leaves by evaporation.
  3. Supplies water for photosynthesis
A
1,2
B
1,3
C
2,3
D
All the above
Question 22 Explanation: 
Importance of Transpiration: Creates transpirational pull for transport of water Supplies water for photosynthesis Transports minerals from soil to all parts of the plant Cools the surface of the leaves by evaporation Keeps the cells turgid; hence, maintains their shape
Question 23
  • Assertion(A): Root pressure is responsible for pushing water to smaller height of the stem
  • Reason(R): As ion from the soil are actively transported into the vascular tissue of the root, water moves along and increases the pressure inside the xylem
A
Both (A) and (R) are correct, but (R) does not explain (A)
B
Both (A) and (R) are wrong
C
Both (A) and (R) are correct and (R) explains (A)
D
(A) is Correct and (R) is wrong
Question 23 Explanation: 
As ion from the soil are actively transported into the vascular tissue of the root, water moves along and increases the pressure inside the xylem. This pressure is called root pressure and is responsible for pushing water to smaller height of the stem.
Question 24
Which of the following statement is correct?
  1. Plants depend on minerals from soil for its nutritional requirements.
  2. All minerals cannot be passively absorbed by the roots
A
1 alone
B
2 alone
C
1,2
D
None
Question 24 Explanation: 
Plants depend on minerals from soil for its nutritional requirements. All minerals cannot be passively absorbed by the roots.
Question 25
Which of the following statement is correct?
  • The concentration of minerals in the soil is usually lower than the concentration of minerals in the root.
  • Most minerals enter the root by active absorption through the cytoplasm of epidermal cells.
  • Minerals are present in the soil as charged particles (ions) that cannot move across cell membranes
A
1,2
B
1,3
C
2,3
D
All the above
Question 25 Explanation: 
Two factors account for this: minerals are present in the soil as charged particles (ions) that cannot move across cell membranes and The concentration of minerals in the soil is usually lower than the concentration of minerals in the root. Therefore, most minerals enter the root by active absorption through the cytoplasm of epidermal cells. This needs energy in the form of ATP. Then it is transported to all parts by transpiration pull.
Question 26
Remobilising of minerals from older dying leaves to younger leaves can be seen in____
A
Deciduous plants
B
Tropical evergreen trees
C
Temperate trees
D
All the above
Question 26 Explanation: 
Minerals are remobilised from older dying leaves to younger leaves. This phenomenon can be seen in deciduous plants.
Question 27
Which of the following minerals are not remobilised?
A
Phosphorous
B
Calcium
C
Sulphur
D
Nitrogen
Question 27 Explanation: 
Elements like phosphorus, sulphur, nitrogen and potassium are easily mobilised, while elements like calcium are not remobilised. Small amounts of material exchange takes place between xylem and phloem.
Question 28
Which of the following statement is correct?
  1. The food synthesised by the leaves are transported by the phloem either to the area of requirement or stored
  2. Phloem tissue is composed of sieve tubes which have sieve plates
  3. Cytoplasmic strands pass through the pores in the sieve plates.
A
1,2
B
1,3
C
2,3
D
All the above
Question 28 Explanation: 
The food synthesised by the leaves are transported by the phloem either to the area of requirement or stored. Phloem tissue is composed of sieve tubes which have sieve plates. Cytoplasmic strands pass through the pores in the sieve plates.
Question 29
_____ transports food (sucrose) from a source to a sink
A
Xylem
B
Phloem
C
Both a and b
D
None
Question 29 Explanation: 
Phloem transports food (sucrose) from a source to a sink. The source is part of the plant that synthesize food, i.e., the leaf, and sink, is the part that needs or stores the food. But, the source and sink may be reversed depending on the season, or the plant’s need.
Question 30
Movement in xylem is always____
A
Bidirectional
B
Unidirectional
C
Tri-directional
D
None
Question 30 Explanation: 
Since the source-sink relationship is variable, the direction of movement in the phloem can be upwards or downwards, i.e., bidirectional. In contrast, the movement is always unidirectional in xylem i.e., upwards.
Question 31
Which of the following statement is incorrect?
  1. The mechanism of translocation of sugars from source to sink is through pressure flow hypothesis
  2. Glucose prepared at source (by photosynthesis) is converted to sucrose.
A
1 alone
B
2 alone
C
1,2
D
None
Question 31 Explanation: 
The mechanism of translocation of sugars from source to sink is through pressure flow hypothesis Glucose prepared at source (by photosynthesis) is converted to sucrose.
Question 32
Sucrose moves into the companion cells, then into the living phloem sieve tube cells by___
A
Active transport
B
Passive transport
C
Both a and b
D
None
Question 32 Explanation: 
Sucrose moves into the companion cells, then into the living phloem sieve tube cells by active transport. This process produces a hypertonic condition in the phloem.
Question 33
Water in the adjacent xylem moves into the phloem by_____
A
Diffusion
B
Translocation
C
Osmosis
D
Peristatic waves
Question 33 Explanation: 
Water in the adjacent xylem moves into the phloem by osmosis. As osmotic pressure builds up, the phloem sap moves to areas of lower pressure. By active transport sucrose moves into the cells where it is utilised or stored. As sugars are removed, the osmotic pressure decreases and water moves out of the phloem.
Question 34
Which of the following statement is correct?
  1. The upward movement of water and minerals from roots to different plant parts is called ascent of sap
  2. A number of factors play a role in ascent of sap
 
A
1 alone
B
2 alone
C
1,2
D
None
Question 34 Explanation: 
The upward movement of water and minerals from roots to different plant parts is called ascent of sap. A number of factors play a role in ascent of sap and it takes places in following steps.
Question 35
Which of the following statement is correct?
  1. Water from soil enters the root hairs due to osmosis
  2. Root pressure is responsible for movement of water up to the base of the stem
A
1 alone
B
2 alone
C
1,2
D
None
Question 35 Explanation: 
Root Pressure: Water from soil enters the root hairs due to osmosis. Root pressure is responsible for movement of water up to the base of the stem.
Question 36
Water or any liquid rises in a capillary tube because of_____ forces
A
Chemical
B
Physical
C
Biological
D
None
Question 36 Explanation: 
Water or any liquid rises in a capillary tube because of physical forces, this phenomenon is called capillary action. In the same way, in stem water rises up to certain height because of capillary action.
Question 37
Water molecules form a continuous column in the xylem because of forces of______ forces
A
Adhesive
B
Cohesive
C
Both a and b
D
None
Question 37 Explanation: 
Water molecules form a continuous column in the xylem because of forces of adhesion and cohesion among the molecules.
Question 38
The force of attraction between molecules of water is called_____
A
Cohesion
B
Adhesion
C
Both a and b
D
None
Question 38 Explanation: 
The force of attraction between molecules of water is called cohesion. The force of attraction between molecules of different substances is called adhesion.
Question 39
Water molecules stick to a xylem because of force of______
A
Cohesion
B
Adhesion
C
Both a and b
D
None
Question 39 Explanation: 
The force of attraction between molecules of different substances is called adhesion. Water molecules stick to a xylem because of force of adhesion.
Question 40
  • Assertion(A): Dews are water droplets on the leaves of grass seen in the early mornings, when the climate is humid and excess of water in the soil
  • Reason(R): This is due to root pressure and this phenomenon is called Guttation
A
Both (A) and (R) are correct, but (R) does not explain (A)
B
Both (A) and (R) are wrong
C
Both (A) and (R) are correct and (R) explains (A)
D
(A) is Correct and (R) is wrong
Question 40 Explanation: 
Dews are water droplets on the leaves of grass seen in the early mornings, when the climate is humid and excess of water in the soil. This is due to root pressure and this phenomenon is called Guttation which takes place through specialized cells called Hydathodes.
Question 41
Which of the following statement is incorrect?
  1. Transpiration through stomata creates vacuum which creates a suction. called transpiration pull.
  2. The transpiration pull sucks the water column from the xylem tubes and thus water is able to rise to great heights even in the tallest plants.
A
1 alone
B
2 alone
C
1,2
D
None
Question 41 Explanation: 
Transpiration through stomata creates vacuum which creates a suction. called transpiration pull. The transpiration pull sucks the water column from the xylem tubes and thus water is able to rise to great heights even in the tallest plants.
Question 42
The blood consists of____ main components.
A
2
B
4
C
3
D
1
Question 42 Explanation: 
Blood is the main circulatory medium in the human body. It is a red coloured fluid connective tissue. The blood consists of two main components. The fluid plasma and the formed elements (blood cells) which are found suspended in the plasma.
Question 43
Plasma is slightly_____
A
Acidic
B
Alkaline
C
Both a and b
D
None
Question 43 Explanation: 
Plasma is slightly alkaline, non-living intercellular substance which constitutes about 55% of the blood.
Question 44
Which of the following are present in plasma?
A
Minerals
B
Proteins
C
Hormones
D
All the above
Question 44 Explanation: 
Organic substances like proteins, glucose, urea, enzymes, hormones, vitamins and minerals are present in the plasma.
Question 45
What is the other name of Blood platelets?
A
Erythrocytes
B
Leucocytes
C
Thrombocytes
D
All the above
Question 45 Explanation: 
Explanation Blood corpuscles are of three types: Red blood corpuscles (RBC) or Erythrocytes White blood corpuscles (WBC) or Leucocytes Blood platelets or Thrombocytes
Question 46
_____ are the most abundant cells in the human body
A
RBC
B
WBC
C
Blood platelets
D
Nephrons
Question 46 Explanation: 
Red blood corpuscles (Erythrocytes) are the most abundant cells in the human body. RBC's are formed in the bone marrow.
Question 47
Which of the following statement is correct?
  1. Mammalian RBC lack nucleus and makes the cells biconcave and increase surface area for oxygen binding
  2. Loss of mitochondria allows the RBC to transport all the oxygen to tissues
A
1 alone
B
2 alone
C
1, 2
D
None
Question 47 Explanation: 
Mammalian RBC lack nucleus and makes the cells biconcave and increase surface area for oxygen binding, loss of mitochondria allows the RBC to transport all the oxygen to tissues, and loss of endoplasmic reticulum allows more flexibility for RBC to move through the narrow capillaries.
Question 48
In which of the following WBC are found?
  1. Spleen
  2. Bone marrow
  3. Thymus
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 48 Explanation: 
WBC are colourless. They do not have haemoglobin and are nucleated cells. It is found in the bone marrow, spleen, thymus and lymph nodes.
Question 49
Which of the following statement is correct?
  1. The RBC's impart red colour to the blood due to presence of respiratory pigment haemoglobin.
  2. Their life span is about 180 days.
  3. Matured mammalian RBC's do not have cell organelles and nucleus.
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 49 Explanation: 
The RBC's impart red colour to the blood due to presence of respiratory pigment haemoglobin. Matured mammalian RBC's do not have cell organelles and nucleus. They are biconcave and disc-shaped. Their life span is about 120 days. RBC is involved in the transport of oxygen from lungs to tissues
Question 50
The white blood corpuscles can be grouped into___ categories
A
3
B
2
C
4
D
5
Question 50 Explanation: 
Explanation White blood corpuscles (Leucocytes) are capable of amoeboid movement. White blood corpuscles can be grouped into two categories: Granulocytes Agranulocytes
Question 51
Which of the following statement about Granulocytes?
  1. They contain granules in their cytoplasm.
  2. Their nucleus is irregular or lobed
  3. The granulocytes are of two types
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 51 Explanation: 
Granulocytes contain granules in their cytoplasm. Their nucleus is irregular or lobed. The granulocytes are of three types: Neutrophils Eosinophils Basophils
Question 52
Neutrophils are large in size and have a____ lobed nucleus
A
3 to 4
B
2 to 7
C
1 to 4
D
5 to 10
Question 52 Explanation: 
Neutrophils are large in size and have a 2 - 7 lobed nucleus. These corpuscles form 60% - 65% of the total leucocytes. Their numbers are increased during infection and inflammation.
Question 53
Eosinophils has a bilobed nucleus and constitute___% -___% of the total leucocytes.
A
4 to 8
B
2 to 3
C
3 to 4
D
5 to 10
Question 53 Explanation: 
Eosinophils has a bilobed nucleus and constitute 2% - 3% of the total leucocytes. Their number increases during conditions of allergy and parasitic infections. It brings about detoxification of toxins.
Question 54
______ release chemicals during the process of inflammation
A
Basophils
B
Eosinophils
C
Neutrophils
D
All the above
Question 54 Explanation: 
Basophils have lobed nucleus. They form 0.5-1.0% of the total leucocytes. They release chemicals during the process of inflammation.
Question 55
How many types of Agranulocytes are there?
A
3
B
2
C
4
D
5
Question 55 Explanation: 
Granules are not found in the cytoplasm of these cells. The agranulocytes are of two types: (i) Lymphocytes (ii) Monocytes
Question 56
Lymphocytes are about____ % of the total leucocytes
A
20 to 30
B
30 to 40
C
35 to 45
D
20 to 25
Question 56 Explanation: 
Lymphocytes are about 20-25% of the total leucocytes. They produce antibodies during bacterial and viral infections.
Question 57
______ are phagocytic and can engulf bacteria
A
Lymphocyte
B
Monocyte
C
Basophils
D
Neutrophils
Question 57 Explanation: 
Monocytes are the largest of the leucocytes and are amoeboid in shape. These cells form 5 - 6 % of the total leucocytes. They are phagocytic and can engulf bacteria
Question 58
Which of the following statement about blood platelets is correct?
  1. These are small and colourless
  2. There are about 2,50,000 – 4,00,000 platelets / cubic mm of blood
  3. Life span of platelets in only 2–3 weeks
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 58 Explanation: 
Blood Platelets or Thrombocytes are small and colourless. They do not have nucleus. There are about 2,50,000 – 4,00,000 platelets / cubic mm of blood. Life span of platelets in only 2–3 days. They play an important role in clotting of blood. Platelets form clot at the site of injury and prevent blood loss.
Question 59
Match the following
  1. Anemia                                          1. Decrease in the number of thrombocytes
  2. Leucocytosis                                  2. Decrease in number of erythrocytes
  3. Leukopenia                        3. Decrease in number of leukocytes
A
2, 1, 3, 4
B
2, 4, 3, 1
C
3, 1, 2, 4
D
2, 3, 4, 1
Question 59 Explanation: 
Anemia: Decrease in number of erythrocytes. Leucocytosis: Increase in the number of leukocytes. Leukopenia: Decrease in number of leukocytes. Thrombocytopenia: Decrease in the number of thrombocytes.
Question 60
Which of the following are the functions of blood?
  1. Transport of respiratory gases (Oxygen and CO2)
  2. Transport of digested food materials to the different body cells
  3. Transport of hormones
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 60 Explanation: 
Functions of blood: Transport of respiratory gases (Oxygen and CO2) Transport of digested food materials to the different body cells Transport of hormones. It acts as buffer and also helps in regulation of pH and body temperature. It maintains proper water balance in the body
Question 61
How many types of blood vessels are there?
A
2
B
4
C
3
D
5
Question 61 Explanation: 
Blood vessels are a network of branched tubes that transport blood. There are three types of blood vessels namely arteries, veins and capillaries.
Question 62
Which of the following statement about Arteries is correct?
  1. They are thick and elastic vessels that carry blood away from the heart to various organs of the body
  2. All arteries carry oxygenated blood except the pulmonary artery which carry deoxygenated blood to the lungs
A
1 alone
B
2 alone
C
1, 2
D
None
Question 62 Explanation: 
Arteries are thick and elastic vessels that carry blood away from the heart to various organs of the body. All arteries carry oxygenated blood except the pulmonary artery which carry deoxygenated blood to the lungs.
Question 63
Which of the following statement is correct?
  1. Veins are thick and non-elastic vessels that transport blood to the heart from the different organs.
  2. All veins carry deoxygenated blood except the pulmonary vein which carry oxygenated blood from the lungs to the heart
A
1 alone
B
2 alone
C
1, 2
D
None
Question 63 Explanation: 
Veins are thin and non-elastic vessels that transport blood to the heart from the different organs. All veins carry deoxygenated blood except the pulmonary vein which carry oxygenated blood from the lungs to the heart
Question 64
Which of the following statement about Capillaries is correct?
  1. Capillaries are narrow tubes formed by branching of arterioles which then unite to form the venules and veins
  2. They are about 8 µm in diameter
  3. Capillaries are formed of single layer of leydig cells
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 64 Explanation: 
Capillaries are narrow tubes formed by branching of arterioles which then unite to form the venules and veins. They are about 8 µm in diameter. Capillaries are formed of single layer of endothelial cells.
Question 65
Which of the following have open type Circulatory System?
  1. Arthropods
  2. Ascidians
  3. Vertebrates
  4. Molluscs
A
1, 2, 3
B
1, 2, 4
C
2, 3, 4
D
All the above
Question 65 Explanation: 
In open type the blood is pumped by heart into blood vessels that open into blood spaces called as sinuses. These sinuses are the body cavities which are called haemocoel. Capillary system is absent. e.g. Arthropods, Molluscs and Ascidians
Question 66
Closed circulatory system was discovered by_____
A
Theocratus
B
Darwin
C
William Harvey
D
Thomas Harvey
Question 66 Explanation: 
Closed circulatory system was discovered by William Harvey (1628) who is regarded the Father of Modern Physiology
Question 67
Which of the following statement about heart is correct?
  1. Heart is a muscular pumping organ that pumps out the blood into the blood vessels.
  2. Human heart is situated between the lungs, slightly tilted toward the left and above the diaphragm in the thoracic cavity.
  3. The heart is made of specialized type of muscle called the cardiac muscle.
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 67 Explanation: 
Heart is a muscular pumping organ that pumps out the blood into the blood vessels. Human heart is situated between the lungs, slightly tilted toward the left and above the diaphragm in the thoracic cavity. The heart is made of specialized type of muscle called the cardiac muscle.
Question 68
_____ fluid which reduces friction during heart beat and protects it from mechanical injuries
A
Cardiovascular
B
Pericardium
C
Cardium
D
None
Question 68 Explanation: 
The heart is enclosed in a double walled sac called pericardium. It contains lubricating pericardial fluid which reduces friction during heart beat and protects it from mechanical injuries.
Question 69
The human heart is____ chambered
A
1
B
2
C
4
D
3
Question 69 Explanation: 
The human heart is four chambered. The two upper thin-walled chambers of the heart are called auricle or atria (sing: atrium) and two lower thick walled chambers are called ventricles.
Question 70
The heart chambers are separated by partition called____
A
Pectum
B
Septum
C
Septa
D
Centa
Question 70 Explanation: 
The chambers are separated by partition called septum. The septum between auricles and ventricles prevents the mixing of oxygenated and deoxygenated blood.
Question 71
Which of the following statement is correct?
  1. The two auricles are separated from each other by interatrial septum
  2. The left atrium is larger than the right atrium
A
1 alone
B
2 alone
C
1, 2
D
None
Question 71 Explanation: 
The two auricles are separated from each other by interatrial septum. The left atrium is smaller than the right atrium.
Question 72
Which of the following statement about closed type system is correct?
  1. In closed type the blood flows in a complete circuit around the body through specific blood vessels
  2. The blood flows from arteries to veins through small blood vessels called capillaries
A
1 alone
B
2 alone
C
1, 2
D
None
Question 72 Explanation: 
In closed type the blood flows in a complete circuit around the body through specific blood vessels. The blood flows from arteries to veins through small blood vessels called capillaries. e.g Vertebrates.
Question 73
______bring oxygenated blood to the left atrium from the lungs
A
Pulmonary veins
B
Pulmonary artery
C
Superior vena cava
D
Inferior vena cava
Question 73 Explanation: 
Pulmonary veins bring oxygenated blood to the left atrium from the lungs. The right and left auricles pump blood into the right and left ventricles respectively.
Question 74
The right atrium receives deoxygenated blood from different parts of the body through_____
  1. Superior vena cava
  2. Pulmonary veins
  3. Inferior vena cava
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 74 Explanation: 
The right atrium receives deoxygenated blood from different parts of the body through the main veins superior vena cava, inferior vena cava and coronary sinus.
Question 75
Which of the following statement is correct?
  1. The ventricles form the upper part of the heart.
  2. The two ventricles are separated from each other by an interventricular septum
  3. The left and right ventricles have thick walls because the ventricles have to pump out blood with force away from the heart
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 75 Explanation: 
The ventricles form the lower part of the heart. The two ventricles are separated from each other by an interventricular septum. The left and right ventricles have thick walls because the ventricles have to pump out blood with force away from the heart.
Question 76
Which of the following statement is correct?
  1. The right ventricle gives rise to aorta
  2. From the right ventricle arises the pulmonary trunk which bifurcates to form right and left pulmonary arteries
  3. The right and left pulmonary arteries supply deoxygenated blood to the lungs of the respective side.
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 76 Explanation: 
From the right ventricle arises the pulmonary trunk which bifurcates to form right and left pulmonary arteries. The right and left pulmonary arteries supply deoxygenated blood to the lungs of the respective side. The left ventricle is longer and narrower than the right ventricle. The walls are about three times thicker than the right ventricle. The left ventricle gives rise to aorta. The oxygenated blood is supplied by the aorta to various organs of the body. The coronary arteries supply blood to the heart.
Question 77
How many types of valve are there in heart?
A
2
B
3
C
4
D
5
Question 77 Explanation: 
The valves are the muscular flaps that regulate the flow of blood in a single direction and prevent back flow of blood. The heart contains three types of valves.
Question 78
Right atrioventricular valve is located between_______
  1. Right ventricle
  2. Left ventricle
  3. Right auricle
A
1, 2
B
1, 3
C
2, 3
D
3, 4
Question 78 Explanation: 
Right atrioventricular valve is located between the right auricle and right ventricle. It has three thin triangular leaf like flaps and therefore called tricuspid valve. The apices of the flaps are held in position by chordae tendinae arising from the muscular projection of the ventricle wall known as papillary muscles.
Question 79
Left atrioventricular valve is also known as_____ valve
  1. Tricuspid
  2. Bicuspid
  3. Mitral
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 79 Explanation: 
Left atrioventricular valve is located between the left auricle and left ventricle. It has two cusps and therefore called bicuspid or mitral valve
Question 80
Match the following
  1. Two chambered                                         1. Aves
  2. Three chambered                                     2. Fishes
  3. Four chambered                                         3. Amphibians
  4. Incomplete four chambered                 4. Reptiles
A
2, 3, 1, 4
B
2, 1, 3, 4
C
1, 2, 3, 4
D
4, 2, 1, 3
Question 81
The major arteries (pulmonary artery and aorta) which leave the heart have____ to prevent backward flow.
A
Tricuspid
B
Bicuspid
C
Semilunar
D
Mitral
Question 81 Explanation: 
The major arteries (pulmonary artery and aorta) which leave the heart have semilunar valves which prevent backward flow of blood into the ventricles. They are the pulmonary and aortic semilunar valves.
Question 82
_______ carries oxygenated blood to all the organs of the body
A
Superior vena cava
B
Inferior vena cava
C
Aorta
D
Pulmonary Vein
Question 82 Explanation: 
Circulation of oxygenated blood from the left ventricle of the heart to various organs of the body and return of deoxygenated blood to the right atrium. Aorta carries oxygenated blood to all the organs of the body.
Question 83
The path of pulmonary circulation starts in_______
A
Right auricle
B
Right Ventricle
C
Left Ventricle
D
Left Auricle
Question 83 Explanation: 
The path of pulmonary circulation starts in the right ventricle. Pulmonary artery arises from the right ventricle and reaches the lungs with deoxygenated blood.
Question 84
_____collect the oxygenated blood from the lungs and supplies it to the left atrium
A
Superior vena cava
B
Inferior vena cava
C
Aorta
D
Pulmonary Vein
Question 84 Explanation: 
Pulmonary veins collect the oxygenated blood from the lungs and supplies it to the left atrium of the heart.
Question 85
Which of the following statement is correct?
  1. The supply of blood to the heart muscles (cardiac muscles) is called as coronary circulation.
  2. Cardiac muscles receive oxygenated blood from coronary arteries that originate from the aortic arch.
A
1 alone
B
2 alone
C
1, 2
D
None
Question 85 Explanation: 
The supply of blood to the heart muscles (cardiac muscles) is called as coronary circulation. Cardiac muscles receive oxygenated blood from coronary arteries that originate from the aortic arch. Deoxygenated blood from the cardiac muscles drains into the right atrium by the coronary sinuses.
Question 86
Which of the following statement is incorrect?
  1. When the blood circulates twice through the heart in one complete cycle it is called double circulation.
  2. In double circulation the oxygenated blood do not mix with the deoxygenated blood
A
1 alone
B
2 alone
C
1, 2
D
None
Question 86 Explanation: 
When the blood circulates twice through the heart in one complete cycle it is called double circulation. In double circulation the oxygenated blood do not mix with the deoxygenated blood.
Question 87
In which of the following Single circulation is found?
A
Fishes
B
Reptiles
C
Amphibians
D
All the above
Question 87 Explanation: 
In some animals the oxygenated and deoxygenated blood are mixed and pass through the heart only once. This type of circulation is called single circulation. e.g., fishes, amphibians and certain reptiles.
Question 88
The heart normally beats____ times per minute
A
72 to 80
B
72 to 75
C
73 to 77
D
80 to 88
Question 88 Explanation: 
One complete contraction (systole) and relaxation (diastole) of the atrium and ventricles of the heart constitute heartbeat. The heart normally beats 72 – 75 times per minute.
Question 89
Which of the following statement is correct?
  1. The human heart is myogenic in nature.
  2. The SA node is broader at the top and tapering below
  3. It is made up of thin fibres
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 89 Explanation: 
The human heart is myogenic in nature. Contraction is initiated by a specialized portion of the heart muscle, the Sino-atrial (SA) node which is situated in the wall of the right atrium near the opening of the superior vena cava. The SA node is broader at the top and tapering below. It is made up of thin fibres.
Question 90
_____ acts as the ‘pacemaker’ of the heart
A
Myogenic node
B
Neurogenic node
C
Sino-atrial node
D
None
Question 90 Explanation: 
Sino-atrial node acts as the ‘pacemaker’ of the heart because it is capable of initiating impulse which can stimulate the heart muscles to contract.
Question 91
Atrioventricular bundle was discovered by_____
A
Thomas Hardy
B
Thomas Harvey
C
William Harvey
D
His
Question 91 Explanation: 
The wave of contraction from SA node reaches the atrioventricular (AV) node which is stimulated to emit an impulse of contraction spreading to the ventricular muscle via the atrioventricular bundle and the Purkinje fibres. Atrioventricular bundle was discovered by His (1893). So is called Bundle of His.
Question 92
Normal pulse rate ranges from___ / min
A
80 to 120
B
70 to 90
C
60 to 80
D
70 to 110
Question 92 Explanation: 
When the heart beats the blood is forced into the arteries. The expansion of the artery every time the blood is forced into it is called pulse. It can be felt by placing the fingertip on the artery near the wrist. Normal pulse rate ranges from 70 – 90 / min.
Question 93
Each cardiac cycle lasts about______ sec
A
0.3
B
0.8
C
0.11
D
0.5
Question 93 Explanation: 
The sequence of events occurring from the beginning to the completion of one heart beat is called cardiac cycle. During cardiac cycle blood flows through the chambers of the heart in a specific direction. Each cardiac cycle lasts about 0.8 second.
Question 94
Match the following
  1. Atrial systole                                  1. 0.4 sec
  2. Ventricular systole              2. 0.1 sec
  3. Ventricular diastole            3. 0.3 sec
A
2, 1, 3
B
2, 3, 1
C
3, 1, 2
D
1, 3, 2
Question 94 Explanation: 
Atrial systole: Contraction of auricles (0.1 sec) Ventricular systole: Contraction of ventricles (0.3 sec) Ventricular diastole: Relaxation of ventricles (0.4 sec)
Question 95
Which of the following statement is correct?
  1. The rhythmic closure and opening of the valves cause the sound of the heart
  2. The first sound LUBB is short duration
  3. The second sound DUPP is of a shorter duration
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 95 Explanation: 
The rhythmic closure and opening of the valves cause the sound of the heart. The first sound LUBB is of longer duration and is produced by the closure of the tricuspid and bicuspid valves after the beginning of ventricular systole. The second sound DUPP is of a shorter duration and produced by the closure of semilunar valves at the end of ventricular systole.
Question 96
Which of the following statement is correct?
  1. Blood pressure is the force exerted during the flow of blood against the lateral walls of arteries
  2. Blood pressure is usually expressed in terms of the systolic pressure and diastolic pressure
A
1 alone
B
2 alone
C
1, 2
D
None
Question 96 Explanation: 
Blood pressure is the force exerted during the flow of blood against the lateral walls of arteries. The blood pressure is high in the arteries gradually drops in the arterioles and capillaries and become very low in the veins. Blood pressure is usually expressed in terms of the systolic pressure and diastolic pressure.
Question 97
Which of the following statement is correct?
  1. During ventricular systole, the left ventricle contracts and forces blood into the aorta
  2. The pressure rises to a peak which is referred as Diastolic pressure
  3. During diastole, the ventricles relax and the pressure falls to the lowest value which is referred as diastolic pressure
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 97 Explanation: 
Systolic pressure: During ventricular systole, the left ventricle contracts and forces blood into the aorta. The pressure rises to a peak which is referred as systolic pressure Diastolic pressure: During diastole, the ventricles relax and the pressure falls to the lowest value which is referred as diastolic pressure.
Question 98
In a healthy adult systolic and diastolic blood pressure is expressed a____ mm Hg
A
70 to 110
B
80 to 120
C
90 to 130
D
80 to 100
Question 98 Explanation: 
In a healthy adult during normal resting condition systolic and diastolic blood pressure is expressed as 120mm / 80mm Hg. Blood pressure varies during conditions of physical exercise, anxiety, emotions, stress and sleep.
Question 99
Which of the following statement is correct?
  1. Decrease in blood pressure is termed hypotension
  2. A prolonged or constant elevation of blood pressure is a condition known as hypertension
A
1 alone
B
2 alone
C
1, 2
D
None
Question 99 Explanation: 
A prolonged or constant elevation of blood pressure is a condition known as hypertension (High blood pressure) can increase the risk of heart attack and stroke. Decrease in blood pressure is termed hypotension (Low blood pressure)
Question 100
_____ is used to detect the sound produced by the internal organs of human body
A
Sphygmomanometer
B
Pulse Oximeter
C
Stethoscope
D
Thermometer
Question 100 Explanation: 
A stethoscope is used to detect the sound produced by the internal organs of human body. The heart sound is heard by placing the stethoscope on the chest.
Question 101
Which of the following statement is correct?
  1. Sphygmomanometer is a clinical instrument used to measure blood pressure when a person is in a relaxed and resting condition
  2. It helps to diagnose conditions such as increased or decreased blood pressure.
  3. Monometric and modern digital types are the apparatus used to measure blood pressure
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 101 Explanation: 
Sphygmomanometer is a clinical instrument used to measure blood pressure when a person is in a relaxed and resting condition. The pressure of the brachial artery is measured. It helps to diagnose conditions such as increased or decreased blood pressure. Monometric and modern digital types are the apparatus used to measure blood pressure.
Question 102
The concept of blood grouping was developed by______
A
William Digboi
B
William Harvey
C
Harvey Dent
D
Karl Landsteiner
Question 102 Explanation: 
The concept of blood grouping was developed by Karl Landsteiner (1900). He identified blood groups A, B and O. AB blood group was recognized by Decastello and Steini (1902).
Question 103
Which of the following statement is correct?
  1. Human blood contains certain specific substances called agglutinogens or antigens and agglutinins or antibodies
  2. Human blood group is classified into five groups called A, B, C, AB and O
  3. Antigens are found on the membrane surface of RBC
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 103 Explanation: 
Human blood contains certain specific substances called agglutinogens or antigens (Ag) and agglutinins or antibodies (Ab). Antigens are found on the membrane surface of RBC. Antibodies are present in blood plasma. Based on the presence or absence of antigen and antibodies human blood group is classified into four groups called A, B, AB and O.
Question 104
Which of the following statement is correct?
  1. In ‘A’ group individuals, Antigen A is present on the surface of RBC and antibody b (anti-b) is present in the plasma
  2. In ‘B’ group individuals, Antigen B is present on the surface of RBC and antibody a (anti - a) is present in the plasma.
  3. In ‘O’ group individuals, Antigen A or B are absent on the surface of RBC.
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 104 Explanation: 
A’ group individuals: Antigen A is present on the surface of RBC and antibody b (anti-b) is present in the plasma. ‘B’ group individuals: Antigen B is present on the surface of RBC and antibody a (anti - a) is present in the plasma. ‘AB’ group individuals: Antigens A and B are present on the surface of RBC and antibodies are absent in the plasma. ‘O’ group individuals: Antigen A or B are absent on the surface of RBC. However, the plasma contains both antibodies a and b (anti a and b).
Question 105
_________ blood group are called ‘Universal Recipient’
A
A
B
B
C
AB
D
O
Question 105 Explanation: 
In blood transfusion one must consider the antigen and antibody compatibility (matching) between the donor and the person receiving blood (recipient). Persons with ‘AB’ blood group are called ‘Universal Recipient’ as they can receive blood from persons with any blood group.
Question 106
_____ blood group are called ‘Universal Donor’
A
A
B
AB
C
O
D
B
Question 106 Explanation: 
Persons with ‘O’ blood group are called ‘Universal Donor’ as they can donate blood to persons with any blood group
Question 107
Which of the following statement is correct?
  1. Rh factor was discovered by Landsteiner and Wiener in 1940 in Rhesus monkey
  2. The surface of WBC contains the antigen for Rh factor.
A
1 alone
B
2 alone
C
1, 2
D
None
Question 107 Explanation: 
Rh factor was discovered by Landsteiner and Wiener in 1940 in Rhesus monkey. The surface of RBC contains the antigen for Rh factor. Rh+ (positive) persons have Rh antigen on the surface of RBC while, Rh– (negative) persons do not have Rh antigen on the surface of RBC. Antibodies developed against this Rh antigen is called Rh antibodies.
Question 108
Which of the following does not form the part of lymphatic system?
A
Lymph node
B
Lymphatic Ducts
C
Lymphatic capillaries
D
None
Question 108 Explanation: 
The lymphatic system comprises of lymphatic capillaries, lymphatic vessels, lymph nodes and lymphatic ducts. Lymph is the fluid that flows through the lymphatic system.
Question 109
The lymphatic capillaries unite to form large________
A
Lymph node
B
Lymphatic Ducts
C
Lymphatic Veins
D
Lymphatic Vessels
Question 109 Explanation: 
The lymphatic capillaries unite to form large lymphatic vessels. Lymph nodes are small oval or pear-shaped structures located along the length of lymphatic vessels.
Question 110
Which of the following statement is correct?
  1. Lymph from the intercellular spaces drains into lymphatic capillaries.
  2. Lymph is a colourless fluid formed when plasma, proteins and blood cells escape into intercellular spaces in the tissues through the pores present in the walls of capillaries.
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 110 Explanation: 
Lymph from the intercellular spaces drains into lymphatic capillaries. Lymph is a colourless fluid formed when plasma, proteins and blood cells escape into intercellular spaces in the tissues through the pores present in the walls of capillaries. It is similar to blood plasma, but is colourless and contains less proteins. The lymph contains very small amount of nutrients, oxygen, CO2, water and WBC.
Question 111
Which of the following are the functions of Lymph?
  1. Supplies nutrition and oxygen to all parts where blood can reach
  2. The lymph also carries absorbed fats from small intestine to the blood
  3. Lymphocytes in the lymph defend the body from infections
A
1, 2
B
1, 3
C
2, 3
D
All the above
Question 111 Explanation: 
Functions of Lymph: Supplies nutrition and oxygen to those parts where blood cannot reach It drains away excess tissue fluid and metabolites and returns proteins to the blood from tissue spaces. The lymph also carries absorbed fats from small intestine to the blood. The lymphatic capillaries of intestinal villi (lacteals) absorb digested fats. Lymphocytes in the lymph defend the body from infections.
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