ECF potassium levels affect resting membrane potential. Hyperkalemia (excessive levels of potassium in the blood) and hypokalemia (abnormally low blood potassium levels) both affect the function of nerves and muscles. o Explain how hyperkalemia will initially affect the resting membrane potential and the generation of an action potential. o Explain how hypokalemia will initially affect the resting membrane potential and the generation of an action potential.

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