| The given figure shows monthly changes in the human ovary during the reproductive cycle. |
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| Which of the following statements is correct regarding the labelled structures? |
A) Before puberty, only structure T undergoes meiosis.
B) The hormone produced by structure R stimulates the pituitary gland to secrete luteinising hormone.
C) The hormone produced by structure S is responsible for the development of female secondary sex characters.
D) The hormone produced by P and Q stimulates the proliferation of the endometrial lining of the uterine wall.
Correct Answer: D
Solution :
| In the given figure of human ovary, P is primary follicle, Q is mature Graafian follicle, Tis secondary oocyte, R is corpus luteum and S is corpus albicans. |
| Secondary oocyte (T) is formed only after puberty in a monthly cycle (one in each cycle). The corpus luteum (R) is developed under the effect of luteinising hormone from pituitary. The hormone progesterone secreted by it, maintains the uterine endothelium and stimulates secretion of watery mucus from uterine glands. Corpus albicans (S) secretes no hormone. P (primary follicle) and Q (Graafian follicle) secrete estrogen which stimulates the proliferation of endometrial lining of the uterine wall. |
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