Which of the Following Statements About the Phases of a Neuronal

question 30

Multiple Choice

Which of the following statements about the phases of a neuronal action potential is TRUE?

• A) During the after-hyperpolarization phase, the permeability of the membrane to sodium ions is greater than its permeability to potassium ions.
• B) During the after-hyperpolarization phase, the permeability of the membrane to potassium ions is greater than its permeability at rest.
• C) During the repolarizing phase, the permeability of the membrane to sodium ions is greater than its permeability to potassium ions.
• D) Potassium channels inactivate during the depolarization phase.
• E) Repolarizing to negative membrane potentials causes the sodium channels to inactivate.

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