cells 3.2
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Created by:
jodieisner on December 7, 2010
Subjects:
science, biology, cell structure and function
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7 terms
Terms | Definitions |
|---|---|
 selectivly permeable | Some substances are allowed to pas through and others cannot. The cell membrane is this. |
| diffusion | Molecules move through the cell membrane from an area of higher concentration to lower concentration. |
| osmosis | WATER molocules use diffusion to move across a selectivly permeable cell membrane. (higher to lower concentration) |
| passive transport | When molecules are transported WITHOUT USING cellular energy. |
| active transport | When molecules are transported while USING cellular energy. |
| types of passive transport | osmosis and diffusion |
| types of active transport | carrier proteins and engulfing |
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