the action potential- structure of the nervous system

an electrical signal that passes through a neuron

nerve impulse/or the action potential

what happens when the positive sodium ions (Na+) move into the neuron

the inside of the neuron becomes positive

what happens if positive potassium ions (k+) move outside the cell

the inside of the cell becomes negative again

what causes the the action potential to move like a wave down the axon

the movement of sodium ions and potassium ions