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Will Carroll 01 May 2007 Osmosis in Living Tissue Planning Osmosis is the movement of water from a high water concentration to one of low water concentration, through a selectively permeable membrane. The object of this is to even out the concentrations of the solutions, regardless of the volumes of the solutions. Osmosis Diagrams: Plasmolysis: Movement of Molecules The movement of molecules inside a solution of high water concentration is fast, and so they have more chance of getting through the semi-permeable membrane, and changing the concentration of the solution that has a low water concentration. The things that change the rate that osmosis occurs are: * The Concentration * The Surface area * The Temperature The concentration affects the rate of reaction because if one of the solutions is pure water, and the other is very concentrated with sucrose, the rate will be faster as there are more molecules to move past the semi- permeable membrane, so they will move faster. The...

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