Adrenalin helps the body to adjust to stress when one is very angry, embarrassed or worried.

Ovary secretes estrogen.

A human body has 23 pairs of chromosomes, out of which 22 pairs are autosomes and 1 pair is the sex determining pair.

Human females have two of the same kind of sex chromosomes (XX), while males have two distinct sex chromosomes (XY). The XY chromosomal cells create testosterone and anti-müllerian hormone to turn the genderless sex organs into male. With females, their cells excrete estrogen, driving the body down the female pathway. Thereby, determining the sex of the baby.

Endocrine glands are glands without ducts. Exocrine glands are glands with ducts. Pituatory glands secrete growth hormones. Hence, option (2) is correct.

The shedding of the uterine thickening along with its blood vessels is known as menstruation.

The changes which occur at adolescence are controlled by hormones.

Thyroid gland secretes thyroxine, which controls the process of metamorphosis in a frog.

In boys, there is broadening of shoulders and widening of chest. In females, the region below waist becomes wider.

Adam’s apple is the growing voice box of boys that can be seen as a protruding part in the throat region.

Pituitary gland is located at the base of the brain. It influences the functioning of the other glands. It produces several hormones that control water balance, growth and it stimulates the testes and the ovaries to produce testosterone, estrogen and progesterone.

At puberty, the long bones, i.e. the bones of arms and the legs, elongate and make a person tall.

 Initially, girls grow faster than boys.

During adolescence, we can see the following: (A) Change in body shape (B) Enlargement of ovaries (C) Attainment of emotional maturity (D) Growth of pubic hair 

Drug addicts are not well adjusted to the society.