Explain how pituitary hormones influence the activity of Leydig cells and Sertoli cells present in human testes.

Question

(a) Explain how pituitary hormones influence the activity of Leydig cells and Sertoli cells present in human testes.

(b) The Spermatogonia has 46 chromosomes in a human male. Give the number of chromosomes in a (i) Primary spermatocyte and (ii) Spermatid.

Answer 1

(a) In males, LH acts on Leydig cells and causes them to release androgens, which stimulate the process of spermatogenesis; while the FSH acts on the Sertoli cells, which helps in spermiogenesis.

(b) (i) Primary spermatocyte – 46 chromosomes

(ii) Spermatid – 23 chromosomes.