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In the Slow Block to Polyspermy, Sperm Penetration Releases an Inflow

Question 25

Multiple Choice

In the slow block to polyspermy, sperm penetration releases an inflow of , which in turn stimulates the .

A) Cl-; corona radiata
B) K+; zona pellucida
C) Na+; fertilization membrane
D) Ca₂+; fertilization membrane
E) Ca₂+; cortical reaction

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