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Hormonal Control of Male Reproductive System MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

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  • Hormonal Control of Male Reproductive System is considered one of the most asked concept.

  • 13 Questions around this concept.

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At what sperm count do the Sertoli cells cease the release of inhibin?

Concepts Covered - 1

Hormonal Control of Male Reproductive System
  • At the onset of puberty, the hypothalamus causes the release of FSH and LH into the male system for the first time from the pituitary through the release of GnRH.
  • FSH enters the testes and stimulates the Sertoli cells to begin facilitating spermatogenesis.
  • LH also enters the testes and stimulates the interstitial cells of Leydig to make and release testosterone into the testes and the blood.
  • Testosterone, the hormone responsible for the secondary sexual characteristics that develop in the male during adolescence, stimulates spermatogenesis. 
  • These secondary sex characteristics include a deepening of the voice, the growth of facial, axillary, and pubic hair, and the beginnings of the sex drive.
  • A negative feedback system occurs in the male with rising levels of testosterone acting on the hypothalamus and anterior pituitary to inhibit the release of GnRH, FSH, and LH.
  • The Sertoli cells produce the hormone inhibin, which is released into the blood when the sperm count is too high. 
  • This inhibits the release of GnRH and FSH, which will cause spermatogenesis to slow down. 
  • If the sperm count reaches 20 million/ml, the Sertoli cells cease the release of inhibin, and the sperm count increases.


 

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Hormonal Control of Male Reproductive System

Biology Textbook for Class XII

Page No. : 47

Line : 34

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