Dissolved substances

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  • Created by: bucks
  • Created on: 17-03-13 12:47


  • Dissolved substances move by diffusion and active transport.
  • Water moves across boundaries by osmosis.
  • Osmosis - diffusion of water from a dilute concentration to a more concentrated solution through a partially permable membrane that allows the passage of molecules.
  • Differences in the concentrations of the solutions inside and outside of cells cause water to move in or out of a cell.

Sports Drinks

  • Most soft drinks contain water, sugar and ions.
  • Sports drinks contain sugars to replace sugar used in energy release in respiration during activity. 
  • Also contain water and ions to replace them when lost in sweating.
  • If…


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