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We have seen a couple of times now that action potentials occur because of the rapid...

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Medical Sciences

We have seen a couple of times now that action potentials occurbecause of the rapid switching of places of sodium and potassiumions across a plasma membrane (“Na+ IN, K+ OUT”). The influx ofsodium into a cell causes depolarization of the membrane; theefflux of potassium out of a cell repolarizes the membrane. In yourown words, describe how excess extracellular K+ would affect thisprocess, if at all.

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3.8 Ratings (674 Votes)
Potassium is the most abundant intracellular cation and about 98 of the bodys potassium is found inside cells with the remainder in the extracellular fluid including the blood Membrane potential is maintained principally by the concentration gradient and membrane permeability to potassium with some contribution from the NaK pump The potassium gradient is critically important for many physiological processes including maintenance of cellular    See Answer
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