BIOL 240W 1st Edition Lecture 27Outline of Last Lecture I. Reproductive SystemII. TestosteroneIII. Reproductive EndocrinologyOutline of Current LectureI. OvulationII. Follicular PhaseCurrent LectureI. Ovulationa. Egg cell initially frozen in prophase oneb. Within the first two weeks, goes through meiosis one and metaphase II inside ovaryc. Surrounding red cells are follicle cells-secrete hormonesII. Follicular phasea. Rising levels of gnRH tell anterior pituitary to release LH and FSH. Both tell follicle to grow and mature, follicles go through mitosis and egg cell goes through meiosisb. Follicle cells produce a little bit of estrogeni. Differing levels of estrogen (3 levels) signal anterior pituitary to produce different responses1. Small amount of estrogen signals the production of LH and FSH, but inhibits the release of the produced hormones2. Follicles grow, now estrogen levels produced are normal. Normal levels trigger the release of stored up LH and FSHii. Surge of LH triggers ovulationiii. Follicle is ruptured, and these cells are called the corpus luteum1. Corpus luteum takes over estrogen and progesterone production2. Also produces inhibin- does not let other follicles develop in the chance of fertilization of the previously released egg3. Corpus luteum degenerates if fertilization does not occurThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a
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