Reaching The Age Of Adolescence Book Back Questions 8th Science Lesson 20
8th Science Lesson 20
20] Reaching The Age Of Adolescence
Book Back Questions with Answer and Do You Know Box Content
Do You Know?
Testes and ovaries are called primary sex organs of the male and female respectively.
At puberty, the growth of the larynx is larger in boys than that of girls. The growing voice boys can be seen as a protruding part of the throat called Adam’s apple, so that the voice becomes deep and harsh. This is caused mainly by male hormone (regulatory chemicals) during adolescence. As a results of this, muscles (chords) attached to the cartilage get loosened and thickened. When air passes through these loosened and thickened chords a hoarse sound is produced. In girl’s larynx is hardly visible from outside because of its small size and the voice becomes high pitched.
The secretions of sweat and sebaceous or subcutaneous glands (oil glands) are very active during adolescence. Many adolescent boys and girls get pimples on face because of increased activity of these glands in the skin. Owing to extra secretions sometimes a distinctive odour is also produced from the bodies.
Estrogen is not a single hormone but a collection of related steroid hormones.
Now-a-days girls attain puberty at very early age. This is due to food habits. As you eat lot of junk food, the body growth increases and it looks like adults.
Sleep is vital to the well-being of adolescents. It can even help you to come out of the stress you experience during this period. During this period about 8 to 10 hours of sleep each night is necessary. But most teens do not have enough sleep which affects their physical and mental health.
Women should take in more iron in their diet regularly to make up for the loss of blood during menstruation.
Choose the best answers:
1. Adolescence is the period of life between _____________ years of age.
(a) 10 to 16
(b) 11 to 17
(c) 11 to 19
(d) 11 to 20
2. The period at which an organism attains sexual maturity is called _________
(a) Puberty
(b) Adolescence
(c) Growth
(d) Maturity
3. During puberty, the region below the waist become wider in _____________
(a) Boys
(b) Girls
(c) Both a and b
(d) None of these
4. Adam’s apple is the growth of the ______________
(a) Pharynx
(b) Thyroid
(c) Larynx
(d) Parathyroid
5. Many adolescent boys and girls get pimples on face, due to the secretions of _____________ gland.
(a) Sweat
(b) Sebaceous
(c) Sweat and sebaceous
(d) None of these.
6. The sperm is produced by ____________
(a) Penis
(b) Ovary
(c) Uterus
(d) Testes
7. ___________ are the chemical substances, secreted by endocrine glands.
(a) Hormones
(b) Enzymes
(c) Proteins
(d) Fatty acids
8. Androgen production is regulated by __________
(a) GH hormone
(b) LH Hormone
(c) TSH hormone
(d) ACTH hormone
9. During menstruation, the progesterone level is _________
(a) Decreased
(b) Increased
(c) Ceased
(d) Normal
10. ___________ intake needs to be increased to prevent osteoporosis in later life.
(a) Potassium
(b) Phosphorus
(c) Iron
(d) Calcium
Fill in the blanks:
1. ______ is secreted by the ovaries of female.
2. The hormones secreted by the gonads are controlled by __________.
3. Milk secretion during lactation is controlled by ____________________ hormone.
4. The male and the female gamete fuse together and form. ____________.
5. The first menstrual flow begins at puberty and it is termed as ____________.
6. __________ usually occurs 14 days after ovulation.
7. _______________ includes protein, carbohydrates, fats and vitamins in requisite proportion.
8. ______________ helps to prevent thyroid gland related diseases.
9. Iron deficiency leads to _________.
10. In women fertilization takes place at ___________.
State true or false. If false, correct the statement:
1. There is a sudden increase in the height of both boys and girls during puberty.
2. The release of ovum from the uterus is called ovulation.
3. During pregnancy, the corpus luteum continues to grow and produces large amount of estrogen and progesterone.
4. Making use of disposable napkins or tempons may increase the chances of infections.
5. Using clean toilets for defecation is a good practice.
Match the following:
Puberty – Testosterone
Adam’s apple – Muscle development
Androgen – at 45 to 50 years of age
ICSH – Sexual maturity
Menopause – Change in voice
Answers:
Choose the best answers:
1. 11 to 19 2. Puberty 3. Both a and b 4. Larynx 5. Sebaceous 6. Testes 7. Hormones 8. LH hormone 9. Ceased 10. Calcium
Fill in the blanks:
1. Estrogen 2. Anterior Pituitary 3. Prolactin 4. Zygote 5. Menarche 6. Menstruation
7. Balanced diet 8. Iodine 9. Anaemia 10. Fallopian tube
State true or false. If false, correct the statement:
1.True
2.False
Correct answer: The release of ovum from the ovary is called ovulation
3.True
4.False
Correct answer: Making use of disposable napkins or tampons may decrease the chances of infections.
5.True
Match the following:
1.Puberty- Sexual maturity
2.Adam’s apple- Change in voice
3.Androgen- Muscle development
4.ICSH- Testosterone
5.Menopause- at 45 to 50 years of age