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9 Cards in this Set
- Front
- Back
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Diffusion |
Movement of particles down a concentration gradient and move randomly till they are evenly spread |
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How are particles able to move? |
Liquid and gas particles arent in fixed positions and therefore are able to freely move over one another |
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What kind of transport is it? |
Passive Transport |
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Passive Transport |
Doesnt require any energy Cells use it to get important particles in and out of them |
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What do the particles have to pass through? |
A selectively permeable membrane, good for small molecules (oxygen and carbon dioxide) |
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4 factors that affect the rate of diffusion |
Distance Concentration gradient Surface area Temperature |
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Distance |
The bigger the distance the slower the rate of diffusion |
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Concentration gradient |
High --> Low Steeper the gradient the faster the rate of diffusion |
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Examples of diffusion |
Digestive System Lung Leaves |
