To the lei of this region the membrane is

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Unformatted text preview: the acVon potenVal 4 Na+ + + + + – – – – + + – – – – K+ Membrane potenVal (mV) +50 Na+ + + Na+ Na+ AcVon potenVal 2 –100 2 DepolarizaVon 3 0 –50 Falling phase of the acVon potenVal 4 Threshold 1 5 1 ResVng potenVal Time Na+ Extracellular fluid Na+ + + + + + + + + + + Plasma membrane – – – – – – – – Cytosol – – Sodium channel 1 ResVng state AcVvaVon gates Potassium channel + + – – K+ + + – – InacVvaVon gate Na+ + + + + + + + + – – – – – – – – K+ 5 Undershoot What Parts of a Neuron can Conduc...
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