Diffusion, Osmosis and Active Transport

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  • Created by: R_Hall
  • Created on: 21-06-11 11:00


  • Molecules in gases and liquids move randomly, but appear to move away from where they are concentrated to where they not so concentrated.
  • Diffusion is a passive process- it does not need energy,


  • Osmosis is the movement of water from a dilute solution to a more concentrated solution through a partially permeable membrane.
  • A partially permeable membrane lets through some molecules, but not others.
  • Red blood cells maintain water balance through osmosis. If a…


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