Nerve cell is at resting potential with diffusion of Na+ & K+ down concentration gradient as cell pumps up the gradient
neurons recieve stimulation causing local potentials which may lead to reach threshold
sodium channels in trigger zone of axon opens
sodium ions diffuse inward, depolarizing the membrane
potassium channels in the membrane open
potassium ions diffuse outward, repolarizing the membrane
action potential causes electric current that stimulates adjacent portions of the membrane
action potentials occurs sequentially along the length of axon as nerve impulse
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