Question

Why does spermatogenesis occur during puberty?

• A. Due to significant increase in growth hormones in male body
• B. Due to significant increase in number of germ cell
• C. Due to significant increase in GnRH secreted from hypothalamus
• D. Due to significant decrease in GnRH secreted from hypothalamus

Answer 1

The correct option is C Due to significant increase in GnRH secreted from hypothalamus

Spermatogenesis is the process by which haploid spermatozoa develop from germ cells in the seminiferous tubules of the testis. This process starts with the mitotic division of the stem cells located close to the basement membrane of the tubules. Initiation of spermatogenesis occurs at puberty due to the interaction of the hypothalamus, pituitary gland and Leydig cells.
Spermatogenesis starts at the age of puberty because of significant increase in the secretion of gonadotropin releasing hormone (GnRH) secreted by hypothalamus. The increased levels of GnRH then acts at 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. 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 spermiogenesis.