Biology 1 Cell Unit Words
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Created by:
carmelablackwell on February 14, 2012
Classes:
Blackwell's Biology Vocab, Blackwell Biology
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10 terms
Terms | Definitions |
|---|---|
 Diffusion | Movement of particles or molecules from an area of high concentration to an area of low concentration |
| Osmosis | Diffusion of water across a selectively permeable membrane |
| Selectively pemeable membrane | A membrane that allows certain materials to pass through, but not others |
| Hypertonic | A solution that has a higher concentration of solutes than another. |
| Hypotonic | A solution that has a lower concentration of solutes than another. |
| Isotonic | Two solutions that have an equal concentration of solutes. |
| solute | substance thatn is dissolved in a solution |
| cell membrane | regulates and controls what enters or leaves the cell |
| facilitated diffusion | this form of diffusion is regulated by protein channels in the membrane and requires no energy input from the cell |
| active transport | movement of molecules or ion into or out of the cell against its concentration gradient (from low to high) and requires an input of energy. |
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