Question

---causes pimples in both boys and girls at puberty.
A. Increased activity of sweat and sebaceous gland
B. Decreased activity of sweat and sebaceous gland
C. Inactivity of sweat and sebaceous gland
D. Viral infection

Answer 1

Hint: Puberty starts at the age of 10-14 years in both boy and girl. It causes both physical and hormonal changes in the body.

Complete Answer:
To solve this question, we must know about the effect of puberty on the body.
At puberty, the body starts producing hormones which is responsible for the development of secondary sexual characters in both male and females. This change in androgens causes other physical and psychological changes in the body.

The secondary sexual characters are a follow:
In males- The increased production of testosterone causes changes like
- Development of facial and body hair.
- Deepening of voice and Adam's apple.
- Broadening of shoulders and development of muscles.
- Development of testicles.
- Erection of the penis.
- Acne and pimples.

In females- the increased production of estrogen and progesterone leads to
- Onset of menstruation.
- Breast development.
- Widening of hip and accumulation of fat in breast and thighs.
- Development of pubic hair.
- Development of the uterus.
- Acne and pimples.

 Acne and pimples are caused due to the androgens which makes the sweat and sebaceous glands overactive.

The correct answer is (A).

Note: At puberty, males and females become reproductively active. Environmental factors and lifestyle regulate the onset of puberty. Lower protein diet and high fibre diet is responsible for delay in the onset of puberty especially in females.