Thursday, May 19, 2011

2.12

Diffusion:
The movement of substances from an region of high concentration to an region of low concentration


Osmosis: 
movement of water from a dilute solution to an area of low concentrated solution.
transporting salts encourages water intake


Active transport
energy driven movement of substances that move from an area of high concentration to an area of low concentration. cells who do active transport will respire a lot and build up high concentrations of certain molecules

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