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

During the _________blank phase, the inside of the cell becomes positively charged, and during the _________blank phase, the membrane potential returns to its resting value.Multiple Choicerepolarization; depolarizationpolarization; restingdepolarization; repolarizationactive; resting

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

During an action potential, depolarization is due to Blank______ ions Blank______ the cell.Multiple choice question.calcium, leavingpotassium, enteringsodium, leavingsodium, enteringpotassium, leaving

Sodium ions move into a neuron during Blank______.Multiple choice question.repolarizationdepolarization

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