Abstract
FROG muscles with elevated sodium and depleted potassium contents recover to their normal low sodium and high potassium state in the presence of external K+ ions1,2. The recovery process involves active Na extrusion, an electrogenic hyperpolarising action of the Na pump and an active inward transport of K+ ions3,4. Frog striated muscle fibres, in common with other cell types, show an increased rate of sodium extrusion when external Na+ ions are removed and are replaced with an inert substance such as Tris or choline5–7.
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SJODIN, R., MEDICI, A. Inhibitory effect of external sodium ions on the potassium pump in striated muscle. Nature 255, 632–633 (1975). https://doi.org/10.1038/255632a0
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DOI: https://doi.org/10.1038/255632a0
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