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8 terms

Impulse Conduction - 8 STEPS

STUDY
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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