Select all that applyOnce a cell's threshold has been reached Blank______.Multiple select question.the sodium voltage-gated channels close rapidlythe sodium voltage-gated channels open rapidlythe repolarization phase beginsthe potassium voltage-gated channels close rapidlythe depolarization phase begins

Voltage-gated sodium channels close and inactivation gates open at the end of Blank______.Multiple choice question.depolarizationrepolarization

When the voltage-gated potassium channels open, a large number of potassium ions Blank______ the cell, resulting in the Blank______ phase of the action potential.Multiple choice question.exit, depolarizationexit, repolarizationenter, depolarizationenter, repolarization

oward the end of the repolarization phase, the Blank______ gates of the sodium channel close and the Blank______ gates of the sodium channels open.Multiple choice question.activation, inactivationinactivation, activation

Select all that applyThe phases of the action potential include Blank______.Multiple select question.thresholddepolarizationresting phaserepolarization

oltage-gated sodium channels close and inactivation gates open at the end of Blank______.Multiple choice question.repolarizationdepolarization