Impulse Conduction - 8 STEPS

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STEP 1

Nerve cell is at resting potential with diffusion of Na+ & K+ down concentration gradient as cell pumps up the gradient

STEP 2

neurons recieve stimulation causing local potentials which may lead to reach threshold

STEP 3

sodium channels in trigger zone of axon opens

STEP 4

sodium ions diffuse inward, depolarizing the membrane

STEP 5

potassium channels in the membrane open

STEP 6

potassium ions diffuse outward, repolarizing the membrane

STEP 7

action potential causes electric current that stimulates adjacent portions of the membrane

STEP 8

action potentials occurs sequentially along the length of axon as nerve impulse

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