KCET · BIOLOGY · STD 11 - 19. Chemical Coordination and Integration

A girl after attaining sexual maturity shoes development of growing ovarian follicles, development of mammary glands and high pitch of voice. These changes are attributed to __________ hormones.

A androgens
B melatonin
C estrogens
D progesterone

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Answer & Solution

Correct Answer

(C) estrogens

Step-by-step Solution

Detailed explanation

(C) estrogens,
Estrogens produce wide ranging action such as stimulation of growth and activities of female secondary sex organs, development of growing ovarian follicles, appearance of female secondary sex characters (e.g. high pitch of voice, etc.) and mammary gland development. Estrogens also regulate female sexual behaviour

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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