BIOL373 Lecture Notes - Lecture 30: Basal Lamina, Sertoli Cell, Meiosis
2 Sep 2019
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Document Summary
Male reproductive system: testicular migration into scrotal sac is feature of some species of mammals, androgen-dependent. 2-3 less than body temperature: failure to descend = cryptorchidism. Spermatozoan: from spermatogonium to release into lumen of tubule: 64 days (human, 12 days transit time in epididymis. Effects of testicular androgens: negative feedback control of lh/fsh and gnrh, primary sex characteristics, development and maintenance of internal external genitalia, support of spermatogenesis, secondary sexual characteristics and. Metrium" = uterus: endo metrium = inner lining of uterus, glandular epithelium + lamina propria, myo metrium = smooth muscle of uterus. Follicular phase: begins with luteal regression low ovarian steroids menses, ovary, selected follicle begins to grow secretes estrogen, sustained exposure to high estrogen (low progesterone) causes massive release of gonadotropins. Lh surge ovulation: uterus, part of endometrial lining shed due to steroid withdrawal menses, rising estrogen (from maturing follicle) stimulates regrowth of lining.
