In the Fast Block to Polyspermy, Binding of Sperm Opens

question 27

Multiple Choice

In the fast block to polyspermy, binding of sperm opens up channels, which depolarizes the egg membrane and .

• A)Na+; prevents the entrance of any more sperm
• B)Na+; prevents the entrance of more Na+
• C)Na+; prevents the entrance of Ca₂+
• D)Ca₂+; prevents the entrance of any more sperm
• E)Ca₂+; prevents the entrance of more Na+

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