PHYSICS 102 Lecture Notes - Lecture 7: Secondary Sex Characteristic, Fallopian Tube, Egg Cell
Document Summary
Hormonal regulation: many glands cannot function without stimulation from hypothalamus and adrenal pituitary. Important in preparing suitable environment for nourishing a developing embryo/foetus: contributes to breast"s ability to produce milk. In each cycle, 15-20 follicles develop but only one continues to ovulation (the rest die: every 28 days, you lose 15-20 eggs. Follicular phase: hormonal changes, fsh and lh rise at the beginning of the cycle due to gonadotropin-releasing. Hormone (gnrn) release: stimulate oestrogen release from the developing follicle. Inhibits fsh but not lh secretion: can sense fertilisation hasn"t happened as it"s got the set number of follicles for the cycle. Corpus luteum: released oocyte enters oviduct where it may or may not be fertilised, corpus luteum produces progesterone, ruptured follicle forms the corpus leteum. Uterine cycle: endometrium development, menstrual phase (first 4 days, endometrium lining of the uterus is disintegrating, bleeding occurs from ruptured blood vessels in endometrium.
