Science Unit 2
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Created by:
twilightgrlzrokk1997 on December 10, 2009
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9 terms
Terms | Definitions |
|---|---|
 selectively permeable | cell membrane allows sine things to enter and leave the cell |
| passive transport | movement of substances without the use of energy |
| diffusion | movement of molecules from many to fewer |
| equilibrium | molecules are evenly spread out |
| osmosis | diffusion of water through a cell membrane from high to low |
| facilitated diffusion | large molecules can diffuse through the membrane with the help of transport proteins |
| active transport | when energy is needed to move materials though the cell membrane |
| endocytosis | large molecules are taken in to the cell by a pinching in of the cell membrane |
| exocytosis | large molecules are released from the cell and placed in a vacuole, releases its contents |
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