Electrical Properties and Ion Permeabilities in Intestinal Epithelia

Abstract

The ionic permeabilities and conductive properties across intestinal epithelia were reviewed from the electrophysiological point of view. Based on our own data on the electrical parameters required for application of the equivalent circuit analysis, the contribution of an extracellular shunt conductance and that of an electrogenic sodium pump to the electrical properties of small intestine were estimated. In order to throw light upon the origin of a solute evoked potential changes, the changes in electrical parameters induced by an active solute transport were discussed.