Dissolved substances

Osmosis

• 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…