B1.7

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  • B1.7- Osmosis
    • Water may move across cell membranes via osmosis. Osmosis is the diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane. 
    • If the concentration of solutes on the solution outside the cell is the same as the internal concentration,the solution is isotonic.
    • If the concentration of the solutes in the solution outside the cell is higher than the internal concentrations, the solution is hypertonic.
    • If the concentration of solutes in the solution outside the cell is lower than the internal concentration,the solution is hypotonic.
    • A dilute solution of sugar contains a high concentration of water, and a low concentration of sugar.
    • A concentrated sugar solution contains a relatively low concentration of water and a high concentration of sugar.
    • Membranes that only allow some types of  particles through are partially permeable.

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