A theory for the membrane potential of cells

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dc.creatorEndresen, Lars Petter
dc.creatorHall, Kevin
dc.date1997-11-18
dc.date.accessioned2026-07-07T05:55:57Z
dc.date.available2026-07-07T05:55:57Z
dc.descriptionWe give an explicit formula for the membrane potential of cells in terms of the intracellular and extracellular ionic concentrations, and derive equations for the ionic currents that flow through channels, exchangers and electrogenic pumps based on simple energy considerations and conservation laws. We demonstrate that the work done by the pump is equal to the potential energy of the cell plus the energy loss due to the downhill ionic fluxes through the channels and the exchanger. Our equations predict osmotic pressure variations. The theory is illustrated in a simple model of spontaneously active cells in the cardiac pacemaker. The simulated action potential and the five currents in the model are in excellent agreement with experiments. The model predicts the experimental observed intracellular ionic concentration of potassium, calcium and sodium. We do not see any drift of the values for the concentrations in a long time simulation, instead we can obtain the same asymptotic values starting with equal intracellular and extracellular ionic concentrations.
dc.description15 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/physics/9711016
dc.identifierhttp://arxiv.org/abs/physics/9711016
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/87435
dc.subjectBiological Physics
dc.subjectClassical Physics
dc.subjectQuantitative Biology
dc.titleA theory for the membrane potential of cells
dc.typetext

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