PHGY 210 Lecture Notes - Lecture 8: Luteinizing Hormone, Mitochondrion, Glans Penis
25 Apr 2018
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Gamete = egg: both have a reproductive tract, allows transportation of gametes after production, external genitalia = visible reproductive tract. Role of males: production of sperm, from testes: Labia: suspension in secretion of accessory glands, seminal vesicles, prostate gland, bulbourethral glands, delivery of sperm into female. Placenta = connects developing fetus to uterine wall for nutrient uptake: secretes human chorionic gonadotropin (hcg, testes present = stimulates production/ secretion of testosterone. Testosterone converted into dihydrotestosterone develops male genitalia. Testes secrete mullerian-inhibiting factor degradation of mullerian ducts. No testosterone during gestation = all embryo feminized! Testes: testes descend in early childhood, cryptorchidism = testes remain undescended into adulthood, sterility, spermatogenesis = development and production of sperm, cold temperatures = cremaster musc and dartos muscle contract, contractions = brings testes closer to the body. Structure of testes = majority = seminiferous tubules produces sperm: leydig cells = cells that produce and secrete testosterone under lh.
