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1.3B Transport
| Term | Definition |
|---|---|
| concentration gradient | difference in concentration of molecules inside and outside the plasma membrane |
| diffusion | movement of molecules rom higher to lower concentration |
| facilitated diffusion/transport | molecules enter carrier, combine with carrier, cause a change in shape of the carrier which allows molecule's release on other side of carrier |
| hypertonic solutions | solutions that cause cells to shrink or shrivel due to loss of water. (adding salt) |
| hypotonic | solutions that cause cells to swell or burst due to intake of water |
| isotonic solutions | makes no change to water content of cell as is same. |
| lysis | shrinking of cells due to removal of water |
| osmosis | movement of water across differentially permeable membrane due to concentration differences. |
| osmotic pressure | the force that causes water to move in that direction. |
| passive transport | diffusion or facilitated transport. tend to move from higher to lower concentration. |
| turgor pressure | in plants, pressure between cell wall and plasma membrane to maintain structure |
| plasmolysis | when plasma membrane pulls away from the cell wall as the large central vacuole loses water. |
Created by:
gwynneth
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