Tharpe- Unit 3.5 Cell Transport
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Created by:
ambertharpe on October 13, 2010
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10 terms
Terms | Definitions |
|---|---|
 Concentration Gradient | difference in concentration from one area to the next |
| ion channel | allows ions to diffuse through the cell membrane |
| passive transport | movement of molecules across a membrane without using energy. |
| active transport | moves molecules from low to high concentration using energy |
| vesicles | pinched off portions of membrane containing substances used as transport vehicle |
| endocytosis | taking in substances by engulfing them in a cell membrane |
| exocytosis | releasing substances through fusion of a vesicle with the cell membrane |
| receptor protein | protein that changes shapes when they bind to a target molecule to allow the molecule to pass through the cell membrane |
| concentration | amount of dissolved particles (solute) in a solutionq |
| concentration gradient | difference in concentration from 1 area to the next |
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