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Action potential review! Neurons at rest: are POLARIZED (Na = extracellular ion, net outside; K = intracellular ion, net - inside). Stimulus triggers local depolarization, if it meets the threshold, it will turn into an action potential…. DEPOLARIZATION occurs when Na floods into neuron in a wave (propagates); REPOLARIZATION occurs in a follow up wave as K leaves the cell. HYPERPOLARIZATION occurs during the refractory period, preventing any new impulses while the neuron resets. The Na/K pump fi
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