What Mechanism Causes the Voltage-Gated Na⁺ Channels to Close During

question 44

Multiple Choice

What mechanism causes the voltage-gated Na⁺ channels to close during an action potential?

• A)The activation gate is voltage sensitive and closes close to the equilibrium potential for Na⁺.
• B)The activation gate is sensitive to K⁺ and closes when its intracellular concentrations drop.
• C)The inactivation gate has a time-dependent closure.
• D)The inactivation gate is voltage sensitive and closes close to the equilibrium potential for Na⁺.

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