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Question
What are the two sequential blocks that prevent polyspermy?
Options
Zona Pellucida Dissolution and Vitelline Membrane Formation
Fast Block (Electrical Block) and Slow Block (Cortical/Zona Reaction)
Fertilizin-Antifertilizin Reaction and Karyogamy
Acrosomal Reaction and Capacitation
MCQ
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Solution
The body uses two sequential blocks to prevent polyspermy (entry of multiple sperm): the Fast Block (Electrical Block), which occurs immediately, and the Slow Block (Cortical/Zona Reaction), which provides a permanent barrier.
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