6-19-08 - 6/19/08 Ovulated secondary oocyte arrested in...

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6/19/08 Ovulated secondary oocyte arrested in metaphase II (a.k.a. ovum) -The ovum is released to the surface of the ovary. The cilia (located at the end of the fimbriae) beat vigorously at the time of ovulation to create a current that sweeps the ovum into the infundibilum. -The ovum is then moved toward the ampulla by the beating of the cilia (luminal surface of the fallopian tube) as well as by (smooth) muscular contractions of the wall of the fallopian tube. ---At this point, the sperm has a negative charge so that it can move through the uterine cavity. -At the time of ovulation, chemoattractants such as progesterone stimulate the sperm to start swimming and move from the isthmus (where it is waiting) to the ampulla (where the ovum is) **The fastest sperm may be the sperm that makes contact w/ the ovum in the ampulla. This sperm will be the only one to complete the acrosome reaction. *The ovum is released with the zona pellucida and the corona radiata intact .
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This note was uploaded on 06/27/2008 for the course BSCI 342 taught by Professor Opoku during the Summer '08 term at Maryland.

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6-19-08 - 6/19/08 Ovulated secondary oocyte arrested in...

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