Which Statement About Blocks to Polyspermy in Sea Urchins Is

question 154

Multiple Choice

Which statement about blocks to polyspermy in sea urchins is true?

• A) The slow block creates a physical barrier that sperm cannot penetrate.
• B) Blocks to polyspermy prevent more than one sperm from approaching an egg.
• C) The fast block causes release of the acrosomal enzymes.
• D) The fast block results from a change in the electrical charge difference across the plasma membrane of the sperm.
• E) The slow block results from a sequestration of calcium in the endoplasmic reticulum of the egg.

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