ANSC 3122 Lecture Notes - Lecture 6: Corpus Luteum, Follicular Cell, Pituitary Gland
Document Summary
Control of hormone production: primarily through feedback systems, 2 primary feedback systems. Negative feedback hormone or biochemical causes a decrease in production. Pregnant animals have high levels of progesterone. Progesterone has a negative impact on production and release of gnrh, fsh, lh. Positive feedback elevated levels of a compound result in increased production of a hormone. In response to high levels of estrogen, massive amounts of gnrh is released from the hypothalamus, causing release of lh and fsh for ovulation. Testis produces testosterone, controlled by tonic center in the brain. + gnrh stimulates lh which stimulates more testosterone to release. Temporarily shuts down gnrh release if testosterone levels are high enough. When the level becomes low enough, gnrh is stimulated to start. + very active transient endocrine gland: mode of action. For reproductive hormones, the modes of action are. Gonadotropins causes stimulation (growth or tropin effects) of the gonads. + 2 primary sex steroids in females (estrogen and progesterone)
