A stimulus excites the neuron membrane, opening sodium channels, increasing sodium influx and making the interior less negative.
A stimulus excites the neuron membrane, opening sodium ion channels and increasing permeability to sodium, which diffuses in, making the inside less negative.
| Front | Stimulus (action potential formation) |
|---|---|
| Back | Stimulus excites neurone cell membrane Sodium ion channels open membrane more permeable to sodium sodium ions diffuse into neurone down sodium ion electrochemical gradient Inside of neurone less negative |
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