Question

GnRH, a hypothalamic hormone, needed in reproduction, acts on :

• A. anterior pituitary gland and stimulates secretion of LH and oxytocin
• B. anterior pituitary gland and stimulates secretion of LH and FSH
• C. posterior pituitary gland and stimulates secretion of oxytocin and FSH
• D. posterior pituitary gland and stimulates secretion of LH and relaxin

Answer 1

The correct option is B anterior pituitary gland and stimulates secretion of LH and FSH

Gonadotropin releasing hormone (GnRH) is a hypothalamic hormone. Increased levels of GnRH acts on the anterior pituitary gland and stimulates secretion of two gonadotropins – luteinising hormone (LH) and follicle stimulating hormone (FSH). LH acts at the Leydig cells and stimulates synthesis and secretion of androgens which 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 spermiogenesis.