Recognise the figure and find out the correct matching.

Options

A. a-anterior pituitary, b- Sertoli cell, c-Leydig cell, d-spermiogenesis, e-spermatogenesis
B. a-posterior pituitary, b-Leydig cell, c- Sertoli cell, d-spermiogenesis, e-spermatogenesis
C. a-anterior pituitary, b-Leydig cell, c-Sertoli cell, d-spermatogenesis, e-spermiogenesis
D. a-anterior pituitary, b-Leydig cell, c-Sertoli cell, d- spermiogenesis, e-spermatogenesis

Answer

C

Explanation

• Spermatogenesis starts at the age of puberty due to significant increase in the secretion of gonadotropin releasing hormone (GnRH). This is a hypothalamic hormone.
• The increased levels of GnRH then acts at the anterior pituitary gland and stimulates secretion of two gonadotropins leutinising hormone (LH) and follicle stimulating hormone (FSH).
• LH acts at the Leydig cells and stimulates synthesis and secretion of androgens. Androgens, in turn, stimulate the process of spermatogenesis.
• FSH acts on the Sertoli cells and stimulates secretion of some factors which help in the process of spermio genesis.