A solution is composed of a solute dissolved in a solvent . In the sugar water described in figure 5.1 . The solute was sugar and the solvent was water . And the solute molecules diffused through the solvent .it is also possible for solvent molecules to difuse . The the case of cell , the solutes are organic and inorganic compounds , and the solvent is water . The process by which water molecules diffuse across a cell membrane from an area of higher concentration to an area of lower concentration , osmosis does not require cells to expend enery . Therefore , osmosis is the passive transport of water. Direction of osmosisthe net direction of osmosis depends on the relative concentration
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