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  • Created by: Jo Wells
  • Created on: 07-04-13 10:34
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  • Osmosis
    • the movement of WATER molecules across a PARTIALLY PERMEABLE MEMBRANE
      • from a region of HIGH concentration to a region of LOW concentration
    • the water molecules move randomly
      • passive movement
    • water moves into and out of cells by osmosis
      • tissue fluid surrounds the cells in the body
        • tissue fluid will usually have a different concentration to the fluid inside a cell
          • meaning water will either move into or out of the cell
            • if a cell is short of water, the solution inside it will become quite concentrated
              • usually meaning the solution outside the cell is more dilute and that water will move into the cell
            • if a cell has lots of water the solution inside it will be more dilute
              • water will be drawn out of the cell and into the tissue fluid


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