Question

Recognise the figure and find out the correct matching

• 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 1

Answer: (C)

• 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 ante rior 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, stim ulate the process of spermatogenesis.
• FSH acts on the Sertoli cells and stimulates secretion of some factors which help in the process of spermiogenesis.