Which of the following is considered as fast blockage to polyspermy?
(1) Acrosomal reaction
(2) Depolarisation of plasma membrane
(3) Cortical reaction
(4) Zona reaction
Annd what is slow block to polyspermy?

Hi Meemansha,
Please find below the solution to the asked query
The correct option is (2)
During fertilisation, the fusion of sperm depolarises the membrane of egg cell and causes fast block to polyspermy.
Hope this information will clear your doubts about the fast block to polyspermy.
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cortical reaction
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