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Solution


Q.

Arrange the sequence of different hormones for their role during gametogenesis.                     [2023]
(A) Gonadotropin LH stimulates synthesis and secretion of androgen.
(B) Gonadotropin releasing hormone from hypothalamus.
(C) Androgen stimulates spermatogenesis.
(D) Gonadotropin FSH helps in the process of spermiogenesis.
(E) Gonadotropins from anterior pituitary gland.
Choose the correct answer from the options given below:
1 (E), (A), (D), (B), (C)  
2 (C), (A), (D), (E), (B)  
3 (B), (E), (A), (C), (D)  
4 (D), (B), (A), (C), (E)  

Ans.

(3)

Spermatogenesis starts at the age of puberty due to significant increase in the secretion of a hypothalamic hormone, gonadotropin releasing hormone (GnRH). The increased levels of GnRH then act 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.