Diffusion and osmosis

Diffusion and osmosis

1. Permeable/Impermeable

   • Selectively permeable

2. Lungs

3. Visking tubing

   • Artificial membrane

4. Preservation

   • Hypertonic solution (bacteria lose water)

5. Turgor pressure

   • Turgid / Plasmolysed (deplasmolysis)

6. Diffusion

   • high concentration to low concentration across a concentration gradient
   • Osmosis
     • Osmosis - water molecules across a semi-permeable membrane
     • Solutions
       • Hypotonic - higher concentration of water than the other solution Hypertonic - lower concentration of water than the other solution Isotonic - Equal concentration of water to the other solution.

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