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Cell Transport
osmosis diffusion cell membrane
5
Science
9th Grade
06/10/2014
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Term
Diffusion
 Definition

net passive movement of particles from high concentration to low

 
Term
Osmosis
 Definition
diffusion of water across semi-permeable membrane down concentration gradient
Term
Active Transport
 Definition
movement of a substance across membrane against concentration gradient. Requires ENERGY
Term
Passive Transport
 Definition
movement of particles across membrane down concentration gradient. No energy required
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