Question

The hormone which acts on Sertoli cells and stimulates the process of spermiogenesis is
A) LH
B) FSH
C) Androgen
D) GnRH

Answer 1

Hint: Spermatogenesis is the process of formation of haploid spermatozoa or sperms from diploid cells. Just remember that spermiogenesis is the final step in the process of spermatogenesis. It happens in humans as well as in frogs.

Complete answer:
To get the answer to this question we must first know about spermiogenesis. Spermiogenesis is the process of the formation of spermatozoa from a spermatid. Along with this formation of the acrosome, condensation and elongation of the nucleus, flagellum development and loss of unnecessary substances of the cytoplasm and its organelles takes place. Finally, each spermatid transforms into spermatozoa.

We know that the hypothalamus, pituitary and testes interact to regulate male reproduction. The hypothalamus secretes gonadotropin-releasing hormone i.e. GnRH. This hormone stimulates the anterior pituitary to secrete the gonadotropin hormone follicle-stimulating hormone (FSH) and luteinizing hormone germinal (LH).

The interstitial cells that are present between seminiferous tubules in the testes get stimulated by LH. They then produce the male sex organ or androgen. Now, FSH is the one that stimulates the Sertoli cells, for the secretion of ABP i.e. androgen binding protein plus the other molecules that are necessary for the completion of spermatogenesis. The work of ABP cells is to bind to testosterone and concentrate it in the tubules.

Thus the correct answer is option ‘B’.

Note:
i) LH is also known as the interstitial cell-stimulating hormone in males as it stimulates the interstitial cells that are present between seminiferous tubules in the testes.
ii) Sertoli cells secrete a peptide hormone called inhibin, which works as the inhibitor for the production of FSH.
iii) Testosterone is the male sex hormone or the principal androgen.