Abstract
IT is a well-established fact that sodium and potassium ions are treated differently by the majority of animal cells. During recent years it has become evident that active extrusion of sodium is taking place in muscle, nerve, etc.1,2,3,4,5 ; on the other hand, the distribution of potassium is often considered to be the result of Donnan equilibria, so that no specific transport mechanism for this ion is regarded as necessary.
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References
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LEVI, H., USSING, H. Resting Potential and Ion Movements in the Frog Skin. Nature 164, 928–929 (1949). https://doi.org/10.1038/164928a0
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DOI: https://doi.org/10.1038/164928a0
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