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membrane-bound
organelle in the head of a sperm that is derived from the golgi apparatus;
the vesicle containing enzymes that digest proteins and complex sugars
in the outer coverings of an egg. Fusion of the acrosomal vesicle
with the plasma membrane of the sperm (in the "acrosome reaction")
exposes receptors that bind to the egg surface and is necessary for
fertilization. |
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