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Target Exam

CUET

Subject

Biology

Chapter

Human Reproduction

Question:

Assertion:  Spermatogenesis starts at the age of puberty.
Reason: There is a significant increase in the level of gonadotropin-releasing hormone at puberty.

Options:

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

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

Assertion (A) is true but Reason (R) is not correct.

Both Assertion (A) and Reason are false (F ) .

Correct Answer:

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

Explanation:

The correct answer is Option (1)- Both Assertion (A) and Reason (R) are correct and R is the correct explanation of A.

Spermatogenesis starts at the age of puberty due to significant increase in the secretion of gonadotropin releasing hormone (GnRH). This, 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.

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