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防止多精入卵的屏障
更新时间: 2021-02-11 11:27:17  

1、防止多精子入卵的第一道屏障。精子与卵子的透明带接触时,顶体酶将透明带溶出一条孔道,精子穿越透明带,并接触卵黄膜.精子接触卵黄膜的瞬间,会引起透明带反应,此为防止多精子入卵的第一道屏障。

2、防止多精子入卵的第二道屏障。精子入卵后,卵黄膜立即发生一种卵黄膜封闭作用,此为防止多精子入卵的第二道屏障。

关键词: 防止 屏障

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