Physiology MCQ Answer 13

• Testosterone – steroid based hormone produced by the interstitial cells of Leydig (located between the seminiferous tubules which produce sperm) – driver release of ICSH (LH) by the anterior pituitary which is stimulated by release of GnRH) by the hypothalamus in a negative-feedback loop triggered by a drop in serum testosterone - prebirth is responsible for masculinizing the reproductive organs – no production from birth to puberty .
• Puberty is responsible for enlarging the male reproductive system, beginning spermatogenesis (production of sperm by the seminiferous tubules, of the testes, stimulated by the release of FSH by the anterior pituitary), development of secondary male sex characteristics (distribution of muscle mass, growth of facial and groin hair, deepening of male voice tone), and the male sex drive.

Category: Physiology MCQs