title: Membrane potential: which formulae do hold?
mesh_terms: D001692:Biological Transport; D002712:Chlorides / Q000378:metabolism*; D008433:Mathematics; D008564:Membrane Potentials; D008566:Membranes / Q000378:metabolism*; D011188:Potassium / Q000378:metabolism*; D012964:Sodium / Q000378:metabolism*
chemical_list: D002712:Chlorides; D012964:Sodium; D011188:Potassium