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Unformatted text preview: -55 o Ex. In potassium channel: potassium would leave o Or Chloride channels open and chloride in • If both are applied then they cancel each other out • Sodium-potassium ATPase: working overtime in neurons, when potassium leaves goes back to resting potential, on upstream side sodium is • Potassium helps bring neuron to resting potential by leaking across membrane • Myelination: layers of fat that go around axon, it stops the charge from leaking out of the membrane as it spreads down the axon • Na+/K+ ATPase: creates the electochemical gradient favoring the outflow of K= when the cell is at rest positive feedback because once sodium channels open and begin to depolarize the membrane they become more likely to open • Sodium moves into and out of the cell via ion channels, its not sodium-potassium pump because it only moves sodium out • Shwann cells form myelin sheath...
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- Winter '11
- myelin sheath, voltage-gated Na channels, voltage-gated calcium channels, Excitatory neurotransmitter attaches, fi ring