How membranes classify on the basis of permability
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How membranes classified on the basis of permeability
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How are membranes classified according to their permeability? Membranes can be classified as impermeable, permeable, semipermeable or selectively permeable. An impermeable membrane is one through which no substance can pass. Semipermeable membranes are those which only let solvents, such as water, pass through them.
A permeable membrane is a biological or synthetic material that has tiny holes in it, allowing small particles (including water molecules and ions) to move through it. A semipermeable membrane is a membrane that only allows certain types of particles to move through it under certain conditions.
You can think of it as being like a sheet of biological fabric with holes in it, where some molecules can fit through the holes and others can't. However, semipermeable membranes can be a bit more complicated than that, because the way particles move can depend on the conditions on either side. For example, particles can move fast, slowly, or not at all depending on how the concentration, pressure, and temperature compares on each side of the membrane.
Generally, particles move through a semipermeable membrane from areas of high concentration to areas of low concentration. This is a process called diffusion.