Item #2 of 10

How many major categories of voltage-dependent channels have been discovered to date along the postsynaptic membrane of a neuron?

one; the sodium-potassium pumps;
two; sodium and potassium channels;
two; chloride and calcium channels;
four; sodium, potassium, chloride, and calcium channels;
none of the alternatives is correct;

INCORRECT - There are four major types of voltage-dependent channels.

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