Question

(a) Draw a sectional view of a seminiferous tubule of human. Label sertoli cell, spermatogonia and leydig cell on it and write their functions. 

(b) Explain the role of pituitary and sex hormones in the process of spermatogenesis.

Answer 1

(a)

Functions : 

Sertoli cells - secrete factors which help in the process of spermiogenesis/provide nutrition to germ cells.

Spermatogonia - divide to produce spermatids/sperms.

Leydig cells - synthesis or secretion of androgens/ testosterone.

(b) Pituitary hormones - LH (luteinizing hormone) - acts on Leydig cells and stimulates synthesis and secretion of androgens.

FSH/follicle stimulating hormone - acts on Sertoli cells and stimulates secretion of some factor that help in spermatogenesis.

Sex hormone - (Androgen/testosterone) stimulate process of spermatogenesis.