HE ABILITY TO CONCENTRATE certain substancesandto expel others seems to be present
in all living cells. Indeed, with the possible exception of certain intracellular parasites, no …

The term active transport is usually used to refer to the transport of a solute across a
biological membrane from one solution to another where its electrochemical potential is …

The fundamental theories of electrolyte diffusion (Nernst, Planck) take into account the
electrostatic forces that coöperate with the “osmotic” forces to cause the migration of ions. In …

This review deals with transport through biological membranes. The term" mem brane" is
used in a purely pragmatic sense: a sheet of unstirred material separating two solutions that …

INTRODUCTION: THE CARR~ ER CONCEPT are now commonly postulated whenever a
membrane transport is unusually fast, selective, or specific beyond the expectation based on …

1. The mechanism of ion transport through bimolecular phospholipid membranes in the
presence of a number of lipid-soluble substances was studied. 2. 2. Membrane conductance …

Transport and Diffusion across Cell Membranes is a comprehensive treatment of the
transport and diffusion of molecules and ions across cell membranes. This book shows that …

Some fundamental properties of barriers are reviewed. The barrier of biologic significance is
the plasma membrane. The role of the barrier in the transport of solvent and neutral solute …

In this paper we shall consider the catalytic systems that are mainly responsible for the
chemically specific transport of small molecular weight substances through the membranes …

• Active transport means movement of ions or other substances across the membrane in com-
bination with a carrier protein in such a way that the carrier protein causes the substance to …