Ion flow through a membrane: concentration and current responses to a step potential change.
Solutions of the simplified time-dependent Nernst-Planck electrodiffusion equations for various membrane models under the influence of a step voltage change are presented. Comparison of the results for a membrane with continuous sites to those for membranes with two, three or five intermediate sites shows little difference either qualitatively or quantitatively in the concentration of the diffusible ion inside the membrane, although some quantitative differences are evident in the calculated currents.
D004553:Electric Conductivity; D007477:Ions; D007700:Kinetics; D008564:Membrane Potentials; D008566:Membranes / Q000502:physiology*; D008954:Models, Biological
D007477:Ions
Biophys J. 1965 Mar;5:145-62
14268950
J Gen Physiol. 1973 Mar;61(3):361-84
4689623
J Theor Biol. 1969 Oct;25(1):113-26
5349446
Biophys J. 1969 Sep;9(9):1160-70
5807223