In a human body, the luteinising hormone (LH) acts on I. Ovaries II. Testes III. Mammary glands
Correct answer: C. I and II
- A. I only
- B. III only
- C. I and II
- D. II and III
Explanation
The correct answer is I and II. Luteinizing hormone (LH) plays a critical role in the reproductive systems of both males and females. In females, LH acts on the ovaries, triggering ovulation and stimulating the production of estrogen and progesterone. In males, LH acts on the testes, stimulating the production of testosterone. LH does not have a direct role in the functioning of mammary glands, which are primarily influenced by other hormones such as prolactin and estrogen. Therefore, options A and B are incorrect, as they exclude one of LH's primary targets, and option D is incorrect as it includes mammary glands, which are not a target of LH.
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Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.
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