When a Depolarizing Graded Potential Makes the Membrane Depolarize to Threshold

question 49

Multiple Choice

When a depolarizing graded potential makes the membrane depolarize to threshold

• A) ligand gated Ca⁺ channels close rapidly.
• B) voltage gated CA⁺ channels open rapidly.
• C) ligand gated Na⁺ channels close rapidly.
• D) voltage gated Na⁺ channels open rapidly.
• E) none of these choices.

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