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Questions and Answers
How does the fertilizing sperm penetrate the corona radiata?
How does the fertilizing sperm penetrate the corona radiata?
- Via membrane-bound enzymes in the plasma membrane of its head (correct)
- By breaking through the zona pellucida
- By pushing its way through the ovum's cytoplasm
- By fusing with the ovum's plasma membrane
What are the ZP3 receptors?
What are the ZP3 receptors?
- Receptors on the zona pellucida (correct)
- Enzymes in the acrosome
- Receptors on the ovum's plasma membrane
- Enzymes in the cortical granules
What triggers the acrosome reaction?
What triggers the acrosome reaction?
- Binding of sperm to ZP3 receptors (correct)
- Fusion of the sperm and ovum plasma membranes
- Release of enzymes from cortical granules
- Digestion of the zona pellucida by acrosomal enzymes
What do the acrosomal enzymes do?
What do the acrosomal enzymes do?
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What happens when the sperm reaches the ovum?
What happens when the sperm reaches the ovum?
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What enters the ovum cytoplasm?
What enters the ovum cytoplasm?
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What do the enzymes stored in cortical granules do?
What do the enzymes stored in cortical granules do?
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What is the block to polyspermy?
What is the block to polyspermy?
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What is the corona radiata?
What is the corona radiata?
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What is the zona pellucida?
What is the zona pellucida?
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What is the acrosome?
What is the acrosome?
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Study Notes
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