Question

Dramatic changes of body features associated with puberty are mainly because of the secretion of

• A. estrogen from testes and testosterone from ovary
• B. estrogen from adrenal gland and testosterone from pituitary gland
• C. testosterone from testes and estrogen from ovary
• D. testosterone from thyroid gland and estrogen from pituitary gland

Answer 1

The correct option is C

testosterone from testes and estrogen from ovary

The correct option is C.

Explanation of correct option:

1. The time in life when a girl or boy becomes sexually mature is puberty.
2. The process takes place between the ages of 10 and 14 in girls, and between the ages of 12 and 16 in boys.
3. During puberty, the male hormone begins to release from the testes.
4. It promotes secondary sexual features in males at the time of puberty like hair growth on the face, masculine voice, etc.
5. On the other hand, in females, estrogen is released from the ovaries during puberty, which is accountable for the development of secondary sexual features like the development of the breast, menstrual cycle, etc.
6. Some of the common changes, which occur in boys and girls at the time of puberty are:

• Increase in height.
• Change in voice, the voice of boys become harsh and deep, while the voice of girls become high-pitched.
• Reproductive organs begin to mature.
• The appearance of secondary sexual features.

Explanation of incorrect options:

Option A:

1. Estrogen is the female hormone, which is released from the ovaries, and testosterone is released from the testes.

Option B:

1. The prime hormone produced by the adrenal gland is adrenaline, which is also known as an emergency hormone.
2. Adrenaline instigates the body’s fight or flight response.
3. Estrogen is secreted by the ovaries, not by adrenal glands.
4. The pituitary gland is the master gland it secretes 7 essential hormones, it does not secrete testosterone hormone.
5. The hormones secreted by the pituitary gland are growth hormone, adrenocorticotropic hormone, thyroid-stimulating hormone, vasopressin, oxytocin, cortisol, follicle-stimulating hormone, and luteinizing hormone.
6. The testosterone hormone is secreted by the testes.

Option D:

1. The thyroid gland secretes the thyroxine hormone, which controls the metabolism of the body.
2. Testosterone hormone is secreted by the testes, not by the thyroid gland.
3. The pituitary gland, which is the master gland of the body, does not secrete estrogen hormone, it is secreted by the ovaries.

Final answer: Dramatic changes in body features associated with puberty are mainly due to the secretion of testosterone from the testes and estrogen from the ovary.