Science

Reaching the Age of Adolescence

Question:

List changes in the body that take place at puberty.

Answer:

Changes at puberty: (i) Sudden increase in height and weight. (ii) Broadening of shouiders and widening of chest in boys. In girls, the region below waist becomes wider. (iii) In boys, under the influence of hormones, the larynx becomes prominent the vocal cords become longer and thicker. These changes cause the voice to become hoarse. (iv) Appearance of hair in areas such as underarms, face, hands, and legs. (v) Appearance of acne as a result of excessive secretion of oil from skin. (iv) Testis grows and starts producing sperms in males, whereas in females, the ovary enlarges and starts producing matured eggs.
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Reaching the Age of Adolescence

Q 1.

Define adolescence.

Q 2.

What is menstruation? Explain.

Q 3.

What is the term used for secretions of endocrine glands responsible for changes taking place in the body?

Q 4.

List changes in the body that take place at puberty.

Q 5.

Write notes on Secondary sexual characters.

Q 6.

Write notes on Adam's apple.

Q 7.

What are sex hormones? Why are they named so? State their function.

Q 8.

Write notes on Sex determination in the unborn baby.