Osmosis

**Osmosis is the** [|**diffusion**] **of a solvent (frequently water) through a** [|**semi-permeable membrane**] **, from a solution of low solute concentration (high water potential) to a solution with high solute concentration (low water potential), up a solute concentration gradient.[|[1]] It is a physical process in which a solvent moves, without input of energy, across a semi-permeable membrane (permeable to the solvent, but not the solute) separating two solutions of different concentrations.[|[2]] Osmosis releases energy, and can be made to do work, as when a growing tree-root splits a stone.

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[|Osmosis Video] **