Question

Acrosomal reaction of the sperm occurs due to

• A. its contact with zone pellucida of the ova
• B. reactions within the uterine environment of the female
• C. reactions within the epididymal environment of the male
• D. androgens produced in the uterus.

Answer 1

Answer: (A)

its contact with zone pellucida of the ova

When head of sperm binds to zona pellucida of ovum the acrosome release its contents by exocytosis. The content inside acrosome includes various hydrolytic enzymes like hyaluronidase, corona penetrating enzymes, etc. This is called aorosomal reaction. It helps the sperm to reach the plasma membrane of ovum, by dissolving corona radiata and zona pellucida.