1 Bio 171 – 5/4/17 • Quiz #3 Due by 9:00 tomorrow. • Midterm #1 regrade requests Due by 5:00 p.m. on Friday, 5/12. • My office hours Will continue for the remainder of the quarter, even though I won’t be lecturing anymore
2 Learning Outcomes - Biology 171, 5/ By the end of this lecture, you should be able to... 1.Describe the normal development of a mature follicle, including both oogenesis and folliculogenesis; explain when each stage of development occurs; and identify which stages of development are under hormonal control. 2.Describe the sequences of events that occur in the ovaries and uterus during the follicular phase of the menstrual cycle, and explain how they are controlled by hormones. 3.Explain the hormonal and cellular processes that cause ovulation. 4.Describe the sequences of events that occur in the ovaries and uterus during the luteal phase of the menstrual cycle, and explain how they are controlled by hormones. 5.Identify the time of maximum fertility during the menstrual cycle and explain the physiological basis for this timing. 6.Explain the hormonal and physiological mechanisms of action of various types of chemical contraception.
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10Uterine events (cont.):•Cervical Mucus– secreted by glands in cervix–Changes across the cycle under the influence of E & P –Across the follicular phase…Volume and stretchiness increase, viscosity decreases Becomes increasingly favorable to sperm–Can have major effects on fertilityUterus: Menstruation & the Proliferative PhaseMucus fibers (strongly meshed)Cervical GlandSperm (blocked from cervix by mucus)
FollicularPhase + Menstruation & Proliferative Phase11ProgesteroneLH
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