Passive diffusion - concentration to an area of lower...

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Passive diffusion Molecule simply dissolves in the phospholipid bilayer, diffuses across it, and then dissolves in the aqueous solution at the other side of the membrane. No membrane proteins involved in process. The net movement of molecules is simply according to the concentration gradient, with molecules moving from an area of higher
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Unformatted text preview: concentration to an area of lower concentration. Water is actually a rather special case - readily diffusable according to concentration gradient. Process is known as osmosis . Larger polar molecules such as glucose cannot cross by passive diffusion. Charged ions also cannot [Na+, Ca++, K+, Cl-], even H+ cannot....
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