Biology
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8 terms
Terms | Definitions |
|---|---|
 passive transport | the movement of substances across a cell membrane without the use of energy by the cell |
| diffusion | the process by which molecules move from an area of higher concentration to an area of lower concentration |
| concentration gradient | The difference in the concentration of a substance from one location to another |
| osmosis | The process by which water molecules diffuse across a cell membrane from an area of higher concentration to an area of lower concentration |
| isotonic | When the concentration of solutes outside and inside the cell are equal |
| hypertonic | describing a solution whose solute concentration is higher than that inside a cell |
| hypotonic | describing a solution whose solute concentration is lower than that inside a cell |
| facilitated diffusion | is the diffusion of molecules across a membrane through transport proteins. |
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