Reaching the age of Adolescence

Samacheer Book Back Questions And Answers For Science Standard 8 “Reaching the age of Adolescence“

I. Choose the best answer:
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

II. 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 _____.

Answers:
1. Estrogen
2. Anterior pituitary
3. prolactin
4. zygote
5. menarche
6. Menstruation
7. Balanced diet
8. Iodine
9. Anaemia
10. Fallopian tube

III. 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 tampons may increase the chances of infections.
5. Using clean toilets for defecation is a good practice.

Answers:
1. True
2. False (The release of ovum from the ovary is called ovulation)
3. True
4. False (Making use of disposable napkins or tampons may reduce the chances of infections)
5. True

IV. Match the following:
1. Puberty                A. Testosterone
2. Adam’s apple       B. Muscle development
3. Androgen             C. at 45 to 50 years of age
4. ICSH                     D. Sexual maturity
5. Menopause          E. Change in voice

Answers:
1. D
2. E
3. B
4. A
5. C

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