BIOL 1051H Lecture Notes - Lecture 3: Seminiferous Tubule, Basal Metabolic Rate, Underarm Hair
20 Jul 2018
School
Department
Course
Professor
Document Summary
Puberty: first ejaculation of viable sperm in boys, physical characteristics. Erythropoisis, basal metabolic rate and increase in appetite. Pubic hair, axillary hair and facial hair develop in response to dht. Stimulates sperm production and libido (sex drive) Endocrine control of puberty: as hypothalamus matures it produces gonadropin-releasing hormone (gnrh, fsh. Stimulates sustentacular cells to secrete androgen-binding protein that binds testosterone, keeping it in seminiferous tubule lumen to stimulate spermatogenesis: lh. Stimulates interstitial cells in testes to produce testosterone: hypothalamus - produces gnrh stimulate anterior to secrete fsh and lh, fsh and lh travel to testes. Rise, if we move testes, no production of testosterone so no negative feedback, so body is saying, we don that testosterone, increases fsh and lh secretion to try to make, but no center so no production: adulthood. Testosterone sustains the male reproductive tract, sperm production and libido.
