| [H+],e-b (nM) | [H+],c (nM) | [Na+],e-b (mM) | [Na+],c (mM) | RH (c/e-b) | RNa (e-b/c) | Direction of transport |
---|
In vitro | 34 (pHÂ 7.4) | 63 (pHÂ 7.2) | 150 | 10 | 1.85 | 15 | Na+ in H+ out |
In vivo | 32 (pHÂ 7.5) | 63 (pHÂ 7.2) | 1 | 10 | 1.95 | 0.1 | Na+ out H+ in |
- [H+], hydrogen ion concentration; [Na+], sodium ion concentration; e-b, endolymph (in vivo) or bath (in vitro); c, cytosol; RH RNa, Ratio of H+ and Na+ concentrations between compartments; Direction of transport into or out of the cell across the apical membrane of strial marginal cells