In the fast block to polyspermy, binding of sperm opens up channels, which depolarizes the egg membrane and .
A)Na+; prevents the entrance of any more sperm
B)Na+; prevents the entrance of more Na+
C)Na+; prevents the entrance of Ca₂+
D)Ca₂+; prevents the entrance of any more sperm
E)Ca₂+; prevents the entrance of more Na+

Question

Quizplus · Accepted Answer

The fast block to polyspermy involves the opening of Na+ channels, leading to depolarization of the egg membrane, which prevents additional sperm from fusing with the egg.

In the Fast Block to Polyspermy, Binding of Sperm Opens