Female Reproductive System: Anatomy, Oogenesis, Oviducts, Uterus, and Vagina

Notes

Amount of GnRH increases, amount of LH and FSH increases – Elevated FSH causes sperm cell formation – Elevated LH causes interstitial cells to secrete larger amounts of testosterone 28-16 Testosterone • Most from interstitial cells of testes with small amounts from adrenal glands and sustentacular cells • Causes enlargement and differentiation of male genitals and reproductive duct system, necessary for sperm cell formation, required for descent of testes, hair growth on certain parts of the body, skin is rougher and coarser, quantity of melanin increases, increases rate of secretion of sebaceous glands, hypertrophy of larynx, increases metabolic rate, increases red blood cell count, increases protein synthesis, rapid bone growth, causes closure of epiphyseal plates 28-17 Male Sexual Behavior and Male Sex Act • Male sexual behavior: testosterone required to initiate and maintain • Male sex act – Complex series of reflexes that result in erection of penis, secretion of mucus into urethra, emission, ejaculation – Sensations result in orgasm associated with ejaculation and then resolution 28-18 Neural Control of Erection 28-19 Emission and Ejaculation • Emission: accumulation of sperm...