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Unformatted text preview: Osmosis Osmosis is the diffusion of water across a differentially permeable membrane (see " Diffusion " above). It occurs when a solute (example: salt, sugar, protein, etc.) cannot pass through a membrane but the solvent (water) can pass through. In areas where the solute concentration is high, the concentration of water molecules is low. In areas where the solute concentration is low, the concentration of water molecules is high. If there is no solute, the water is 100% water (high water concentration). Water moves areas where the concentration of water molecules is high (low solute concentration) to areas where the concentration of water molecules is low (high solute concentration). In general, water moves toward the area with a higher solute concentration because it has a lower water concentration. In the container on the left side of the diagram, water will enter the cell because it is more concentrated on the outside. In the center drawing, water is more concentrated inside the cell, so concentrated on the outside....
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.
- Fall '10