BSCI 1511 Lecture Notes - Lecture 7: Acrosome, Medical Abortion, Acrosome Reaction
5 Apr 2016
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The pill is a synthetic mixture of estrogen and progesterone makes the physiological system think that she"s pregnant goes off the pill for seven days to keep the uterine cycle fresh goes back on the pill for 21 days. Ru 486 the abortion pill binds to progesterone receptors on endometrial cell blocks the receptor menstruation proceeds even if there is an implantation. 32 environmental pollutants can"t choose its mate find each other- synchronization of female and male spawning sperm have to find eggs, and there"s evidence that there is a chemotaxis efficiency- number of sperm and sperm competition species specificity polyspermy. 35 avoiding polyspermy: chromosome number acts even faster. the first few cell divisions forming the spindle fibers: attracted to dna. 41 contents of the granules are osmotium attract water which further separates the ve from the pm hardened by enzymes from the cortical granules.
