We have two surfaces of nerve cell the outer and inner surface
- resting : when the outer layer ion charges more positively than the inner layer - depolarization : we have the counter part of this state
- repolarization : return to the polarization
- hyperpolarization : the inner negative ion charges will be more negative even more than the resting potential
Resting potential: the inside of the neuron's axon is -70mV versus the outside of the membrane
Threshold potential: If the impulse that is received by this neuron's dendrtes meets or exceeds its threshold level enough Na+ activation gates (which are protein ion channels in the axon membrane) will open and Na+ will start to flow into the axon following a charge and concentration gradient.
Depolarization: If the action potential has been initiated (and Na+ has started to move into the axon) then the internal negative charged areas of the membrane will open their Na+ gates as well.
Repolarization: Once K+ have started to move outside of the axon, the original charges along the axon membrane start to become reestablished
Hope That Helps!
