Human ReproductionHard

Question

Acrosome preaction in sperm is triggered by

Options

A.capacitation
B.release of lysin
C.influx of Na+ 
D.release of fertilizin

Solution

Ovum secretes a chemical substance, called fertilizin which has number of spermophilic sites on its surface where the sperm of species specific type can be bonud by their antifertilizin site. This fertilizin- antifertilizin reaction is a highly species specific reaction. The main aim of this reaction is thin out the number of sperms to reduce the chances of polyspermy.

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