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Q.

Given below are two statements: one is labelled Assertion(A) and other is labelled Reason(R).

Assertion(A): Spermatogenesis starts at puberty.

Reason(R): It is due to a significant increase in the secretion of GH.

In the light of above statements, choose the correct answer from the options given below.

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a

Both (A) and (R) are correct and (R) is the correct explanation of (A)

b

(A) is correct but (R) is not correct

c

Both (A) and (R) are incorrect

d

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

answer is C.

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Detailed Solution

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Spermatogenesis starts at the age of puberty due to significant increase in the secretion of gonadotropin releasing hormone (GnRH). It is a hypothalamic hormone. The increased levels of GnRH then acts at the anterior pituitary gland and stimulates secretion of two gonadotropins – luteinising hormone (LH) and follicle stimulating hormone (FSH). LH acts at the Leydig cells and stimulates synthesis and secretion of androgens. Androgens, in turn, stimulate the process of spermatogenesis. FSH acts on the Sertoli cells and stimulates secretion of some factors which help in the process of spermiogenesis.

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Given below are two statements: one is labelled Assertion(A) and other is labelled Reason(R).Assertion(A): Spermatogenesis starts at puberty.Reason(R): It is due to a significant increase in the secretion of GH.In the light of above statements, choose the correct answer from the options given below.