Effects of pH on Potassium: New Explanations for Old Observations
2011
Maintenance of extracellular K+ concentration within a narrow range is vital for numerous cell functions, particularly electrical excitability of heart and muscle. Potassium homeostasis during intermittent ingestion of K+ involves rapid redistribution of K+ into the intracellular space to minimize increases in extracellular K+ concentration, and ultimate elimination of the K+ load by renal excretion. Recent years have seen great progress in identifying the transporters and channels involved in renal and extrarenal K+ homeostasis. Here we apply these advances in molecular physiology to understand how acid-base disturbances affect serum potassium.
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