The slow block to polyspermy is based on release of the contents of the ___________.

Question

Quizplus · Accepted Answer

The slow block to polyspermy is based on the release of cortical granules, which are secretory granules containing enzymes that modify the zona pellucida, a glycoprotein matrix surrounding the oocyte, to make it impenetrable to additional sperm. The pronuclei are formed after fertilization when the sperm and egg nuclei fuse. The acrosome is a structure on the head of the sperm that contains enzymes that help the sperm penetrate the zona pellucida. The zona pellucida is the glycoprotein matrix surrounding the oocyte that serves as a barrier to sperm entry.

The Slow Block to Polyspermy Is Based on Release of the Contents