Life Science Gr7 Ch4 Sec1 quiz
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Created by:
jieunkim97 on December 15, 2009
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8 terms
Terms | Definitions |
|---|---|
 diffusion | movement of small particles from an area of high to low concentration |
| osmosis | diffusion of water though a membrane |
| cells do not use ( ) for diffusion or osmosis | energy |
| passive transport | diffusion of small particles through the proteins from high to low concentration. no energy needed |
| active transport | movement of small particles through proteins from low to high concentration. energy from ATP helps move against the direction of the diffusion |
| small particles can travel through ( ) in 2 ways. | protein. 2 ways: active/passive transport |
| endocytosis | cell membrane surrounds a particle and encloses it in a vescicle |
| exocytosis | vescicle carries particles to cell membrane and cell membrane releases it |
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