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1.3B Transport

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