k ions are the ion that drives the membrane potential back to resting membrane potential (repolarization).
what ion drives the membrane potential back to resting membrane potential (repolarization)?
k ions
repolarization





















































in neuroscience, repolarization refers to the change in membrane potential that returns it to a negative value just after the depolarization phase of an action potential has changed the membrane potential to a positive value. the repolarization phase usually returns the membrane potential back to the resting membrane potential. the efflux of k ions results in the falling phase of an action potential. the ions pass through the selectivity filter of the k channel pore.
repolarization
phase two is repolarization. during repolarization, voltage-gated sodium ion channels inactivate (different from the closed state) due to the now-depolarized membrane, and voltage-gated potassium channels activate (open). both the inactivation of the sodium ion channels and the opening of the potassium ion channels act to repolarize the cell's membrane potential back to its resting membrane potential.
refractory period (physiology)