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.

单词	selective permeability
释义	DictionarySeesemipermeable membrane selective permeability selective permeability [si′lek·tiv ‚pər·mē·ə′bil·əd·ē] (physics) The property of a membrane or other material that allows some substances to pass through it more easily than others. selective permeability selective permeability or 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.
随便看	zviazda zvio zvip zvk zvl z/vm zvma zvmhc zvmm zvms zvnkd zvob zvolen zvom zvon zvonkov, vasilii zvonkov, vasilii vasilevich zvorykin, konstantin zvorykin, konstantin alekseevich zvp zvpdt zvpl zv port zvq zvr