Q.What is meant by the acrosomal reaction of a sperm?

[!TLDR]

The acrosomal reaction is the rupture of a sperm's acrosome, releasing enzymes that digest a path through the oocyte's coverings. …

When a capacitated sperm contacts the corona radiata and zona pellucida surrounding the oocyte, its acrosome (a cap-like structure over the sperm head derived from the Golgi apparatus) ruptures and releases a battery of hydrolytic enzymes. These enzymes digest a passage through both protective layers, allowing the sperm head to reach and fuse with the oocyte's plasma membrane -- the essential step immediately preceding fertilisation itself. …

Recall which sperm structure (the acrosome) ruptures and what it releases (hydrolytic enzymes) to digest …

Confusing the acrosomal reaction (a sperm event, digesting through the oocyte's outer coverings) with the cortical reaction (an oocyte even …