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Potassium ( K + ) plays a significant part in the excitability of cardiac, neural and muscle cells.The evidence'-5 indicates that the excitability of these cells depends upon the ratio of intracellular to extracellular potassium concentrations.Disturbances of K + concentration affect cellular function more than structure and the signs and symptoms of the disturbances result from malfunction of excitable cell membranes.
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Vaughan et al. (1973) studied this question.
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