semipermeable membranemedical dictionary

<biology, physiology> A membrane that is selectively permeable to only one (or a few) solutes.

The potential developed across a membrane permeable to only one ionic species is given by the Nernst equation for the species: this is the basis for the operation of ion selective electrodes.

This entry appears with permission from the Dictionary of Cell and Molecular Biology

(11 Mar 2008)