At fertilization there is a series of Ca 2+ (calcium) waves within the egg. Whic

Question

At fertilization there is a series of Ca2+ (calcium) waves within the egg. Which of the following occurs in the egg in response to these waves?

Cortical granule exocytosis, capacitation, and the acrosome reaction

Slow block to polyspermy, degradation of CSF, and egg activation

Degradation of MPF, completion of mitosis, and egg activation

Fast block to polyspermy, degradation of MPF, and syngamy

At fertilization there is a series of Ca2+ (calcium) waves within the egg. Which of the following occurs in the egg in response to these waves?

Cortical granule exocytosis, capacitation, and the acrosome reaction

Slow block to polyspermy, degradation of CSF, and egg activation

Degradation of MPF, completion of mitosis, and egg activation

Fast block to polyspermy, degradation of MPF, and syngamy

Explanation / Answer

Ans: Option B.

After sperm enrty fast block done by Na+ ion where as slow block done by the rise in Ca2+ ion conc to stops entry of other perm, reactivae the egg meiosis by degrading the CSF, and then fuse two nucleus.

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