<P> A semipermeable membrane is a type of biological or synthetic , polymeric membrane that will allow certain molecules or ions to pass through it by diffusion -- or occasionally by more specialized processes of facilitated diffusion , passive transport or active transport . The rate of passage depends on the pressure , concentration , and temperature of the molecules or solutes on either side , as well as the permeability of the membrane to each solute . Depending on the membrane and the solute , permeability may depend on solute size , solubility , properties , or chemistry . How the membrane is constructed to be selective in its permeability will determine the rate and the permeability . Many natural and synthetic materials thicker than a membrane are also semipermeable . One example of this is the thin film on the inside of the egg . </P>
<P> A semipermeable membrane is a type of biological or synthetic , polymeric membrane that will allow certain molecules or ions to pass through it by diffusion -- or occasionally by more specialized processes of facilitated diffusion , passive transport or active transport . The rate of passage depends on the pressure , concentration , and temperature of the molecules or solutes on either side , as well as the permeability of the membrane to each solute . Depending on the membrane and the solute , permeability may depend on solute size , solubility , properties , or chemistry . How the membrane is constructed to be selective in its permeability will determine the rate and the permeability . Many natural and synthetic materials thicker than a membrane are also semipermeable . One example of this is the thin film on the inside of the egg . </P>
the selective permeability of a cell membrane to different substances depends on
the selective permeability of a cell membrane to different substances depends on
the pressure , concentration , and temperature of the molecules the permeability of the membrane to each solute
the pressure , concentration , and temperature of the molecules the permeability of the membrane to each solute