What is the role of calcium signalling in prevention of polyspermy?
A)Calcium is toxic to the sperm and kills the sperm preventing fertilization.
B)Calcium signalling results in formation of a fertilization envelope.
C)Calcium signalling directs the sperm to another egg in the vicinity.
D)Increases in calcium ensure there is no room for the sperm to fertilize the egg.

Question

Quizplus · Accepted Answer

Calcium signalling plays a crucial role in the prevention of polyspermy, which is the fertilization of an egg by more than one sperm. During fertilization, the calcium signal triggers the formation of a fertilization envelope around the egg, which is impenetrable to any additional sperm. This prevents the entry of more than one sperm, and hence, prevents polyspermy.

What Is the Role of Calcium Signalling in Prevention of Polyspermy