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Polarized membrane state

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What is the polarized membrane state? How is it maintained? (Note the relative roles of both passive and active mechanisms.)

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Polarized membrane state, its maintance and the roles of both passive and active mechanism are discussed.

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The polarized membrane state (of a neuron) is a voltage difference of about -70 mV. The negative sign indicates that the inside of the neuron is negatively charged in comparison to the extracellular fluid. This small buildup of negative charges in the cytosol is the result of negatively charged proteins and phosphate groups that do not traverse the plasma membrane. In addition, there is an excess amount of sodium and chloride ions in the ...

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