Human Reproduction Ques 82
Acrosome reaction in sperm is triggered by zona pellucida [1993]
(a) capacitation
(b) release of lysozyme
(c) influx of $Na^{+}$
(d) release of fertilizin
Show Answer
Answer : d
Hints & Solutions
(d) Egg secretes fertilizin, due to which the acrosome of the sperm secretes antifertilizin, and due to their reaction, sperm adheres to the egg. The acrosome reaction is the reaction which occurs in the acrosome of the sperm as it approaches the zona pellucida. In mammals, the acrosome reaction releases hyaluronidase and acrosin; their role in fertilization is not yet clear. It also alters a patch of pre-existing sperm plasma membrane so that it can fuse with the egg plasma membrane.
BETA
