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Question
The secretion by ___________ helps the sperm to enter into the cytoplasm of the ovum.
The secretion by ___________ helps the sperm to enter into the cytoplasm of the ovum.
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Solution
The correct option is D acrosome
Acrosome is the cap like structure present on the anterior half of the head of the sperm.
During fertilisation, the nucleus of sperm fuses with the nucleus of egg resulting in the formation of a diploid zygote. In order to fuse with the egg, the sperm has to penetrate the envelopes surrounding the egg.
The acrosome of the sperm releases enzymes that help to penetrate the membranes of the egg. This is called acrosome reaction.
The plasma membrane of the egg is surrounded by a thick coat called zona pellucida. The zona pellucida is surrounded by an envelope made of many layers. This is called corona radiata.
The hyaluronidase enzyme helps to break down the hyaluronic acid binding the corona radiata cells together.
The acrosin digests zona pellucida and this allows sperm to enter inside the egg.
Acrosome is the cap like structure present on the anterior half of the head of the sperm.
During fertilisation, the nucleus of sperm fuses with the nucleus of egg resulting in the formation of a diploid zygote. In order to fuse with the egg, the sperm has to penetrate the envelopes surrounding the egg.
The acrosome of the sperm releases enzymes that help to penetrate the membranes of the egg. This is called acrosome reaction.
The plasma membrane of the egg is surrounded by a thick coat called zona pellucida. The zona pellucida is surrounded by an envelope made of many layers. This is called corona radiata.
The hyaluronidase enzyme helps to break down the hyaluronic acid binding the corona radiata cells together.
The acrosin digests zona pellucida and this allows sperm to enter inside the egg.
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