UNC-Chapel Hill BIOL 252 - Sexual Cycle (3 pages)

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Sexual Cycle

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Sexual Cycle


Review of Guest Lecturer

Lecture number:
Lecture Note
University of North Carolina at Chapel Hill
Biol 252 - Fundamentals of Human Anatomy and Physiology

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BIOL 252 1st Edition Lecture 26 Outline of Last Lecture I Oogenesis and Sexual Cycle II Oogenesis III Folliculogenesis IV Sexual Cycle V Ovarian Cycle VI Menstrual Cycle Outline of Current Lecture I Review of Sexual Cycle II Menstrual Cycle III Pregnancy s Effect on Sexual Cycle IV Capacitance V Oocyte at Fertilization VI Events following fertilization Current Lecture I Review of Sexual Cycle a Follicular Phase i Positive feedback responsible for FSH LH spike preceding ovulation ii Maturing follicle secretes estradiol 1 Follicles release estrogen iii Estradiol stimulates hypothalamus and anterior pituitary iv Hypothalamus secretes GnRH v Pituitary secretes LH and FSH vi Oocyte completes meiosis I follicle rapidly enlarges and then ovulates b Luteal Phase i High levels of LH stimulate granulosa and theca cells to form corpus luteum tissue structure w in ovary 1 LH transforms cells in ovary to become corpus luteum ii Corpus luteum produces progesterone 1 Uterus continues to develop iii Follicle cells undergo transition 1 Corpus luteum cell death involution scar tissue corpus albicans These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute II III IV V iv Hormones in high concentration have inhibitory effect 1 Estrogens inhibin progesterone high levels levels to decline Menstrual Cycle a Day 1 first day of noticeable vaginal discharge i Days 1 5 menstrual phase w menstrual fluid ii Days 6 13 proliferative phase b Day 14 ovulation c Day 15 fertilization i Days 15 26 secretory phase d Day 24 implantation e Days 26 29 premenstrual phase f Poll Everywhere i Birth control pills contain progesterone What property of explains its contraceptive nature 1 Prevents formation of corpus luteum a Not true corpus luteum formed as direct result of ovulation 2 Prevents menstrual phase of uterine cycle a Yes it does but don t need menstrual to conceive 3 Maintains secretory phase of uterine

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