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.

Question

Quizplus · Accepted Answer

During the after-hyperpolarization phase, the permeability of the membrane to potassium ions is greater than its permeability at rest. This causes an outward flow of K+ ions, making the membrane more negative before returning to its resting potential.

Which of the Following Statements About the Phases of a Neuronal