selective permeability

(redirected from differential permeability)
Also found in: Encyclopedia.

selective permeability


differential permeability

the capacity of a membrane to allow some particles to pass through but not others. Such ‘differentially permeable’ membranes (e.g. CELL MEMBRANE, cellular organelle membrane, TONOPLAST) allow water molecules to pass readily through them, whereas solutes dissolved in water can pass less rapidly or not at all. The ability of molecules to travel across the membrane and the velocity with which they do so is dependent on the fat solubility, size, and charge of the molecules. An extreme example of differential permeability is a semipermeable membrane which is almost completely impermeable to solute molecules, but is permeable to the solvent.Such membranes, however, are rare.see ACTIVE TRANSPORT.
References in periodicals archive ?
Consecutive values of differential permeability are obtained in intervals given by:
From the differential permeability distributions, the pore number distributions can be obtained by applying the Hagen-Poiseuille model for convective flows.
Third, we discuss the costs and benefits to integration/segmentation and to differential permeability.
Differential Permeability as Middle Ground on the Continuum
We define the state of differential permeability as the firm containing some elements of integration and some elements of segmentation.

Full browser ?