Question

Spermatogenesis in mammalian testes controlled by
1. lutenizing hormones
2. growth hormones
3. follicle stimulating hormones
4. oestrogen

Answer 1

Correct Answer - Option 3 : follicle stimulating hormones

Concept:

• The process of the formation of sperms is called spermatogenesis. It involves 3 phases:

1. In the multiplication phase, male germ cells also called spermatogonia, which undergo mitotic divisions to form a large number of spermatogonia.
2. In the growth phase, spermatogonia prepare for meiotic division by increasing their size and called primary spermatocytes (46 chromosomes).
3. In the maturation phase, the primary spermatocyte undergoes the first meiotic division and produces 4 haploid cells called secondary spermatocytes (23 chromosomes), which after the second meiotic division produces four equal, haploid spermatids.

Explanation:

• Spermatogenesis in mammalian testes controlled by ''Follicle-stimulating hormone''
• Pituitary-derived FSH provides indirect structural and metabolic support for the development of spermatogonia into mature spermatids via its membrane-bound receptor in Sertoli cells.
• FSH also plays a crucial role in the determination of the number of Sertoli cells and thus their capacity to maintain spermatogenesis. 

 

• Estrogen, or oestrogen: It is a sex hormone responsible for the development and regulation of the female reproductive system and secondary sex characteristics. 
• Luteinizing Hormone is found in both males and females. In males, it stimulates the growth and function of Leydig (interstitial) cells, while in females, it stimulates ovulation, development of the corpus luteum, and secretion of progesterone by the corpus luteum.