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10 Cards in this Set
- Front
- Back
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After sperm penetrates the entire zona pellucid what does it reach?
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It reaches secondary oocyte's plasma membrane and fuses with secondary oocyte
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What is fast block to polyspermy?
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Within 1-3 seconds plasma membrane of oocyte depolarizes (electrical change)
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What is slow block to polyspermy?
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Depolarization triggers release of Ca by oocyte--> stimulates Exocytosis of secretory vesicle of oocyte--> release molecules inactive sperm receptors and harden zona pellucid (physical change)
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What occurs once sperm is in secondary oocyte?
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Secondary oocyte completes meiosis II (ovum and polar body)
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What makes a zygote?
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Male pronucleus and female pronucleus fuse--> zygote (diploid)
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What is cleavage?
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Rapid cell division's
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What does cleavage form?
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Forms solid ball of cells
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What is a solid ball of cells called?
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Morula
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What forms after morula?
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Blastocele(blastocyte cavity) forms (fluid filled cavity in center)
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After a blastocele is formed what occurs next?
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A hollow ball (blastocyst)
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