Transport equations and criteria for active transport

Abstract

The relation between driving forces and the flux of solutes that would be expected in a passive system is derived. This relation is a differential equation and different solutions are obtained which apply to different experimental conditions. Solutions are given for the cases of pure convective flow, diffusion, electrophoretic mobility, balance between diffusive and electrical forces, and transport in the presence of both concentration and voltage differences. © 1970 by the American Society of Zoologists.