![]() ![]() Signals move through a neuron via an action potential, in which a region of the neuron undergoes depolarization via opening of the Na/K channels leading to a rush of Na+ into the cell, with subsequent loss of the basal resting potential (so the usual -70mV may go, for example, to +20mV). Because there are relatively more positive ions outside the cell, this creates an electrical gradient with a resting potential inside the cell of -70mV. Perhaps the most important of these is the sodium potassium channel, which maintains the basal resting potential of the neuron by pumping three Na+ ions out of the cell for every two K+ ions it pumps into the cell. Neuronal membranes have a multitude of ion channels that maintain order and control signals in and around themselves. ![]()
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