| Term | Definition |
|---|
| diffusion | movement of molecules form an area of lower concentration to a higher one |
| cncentration gradient | difference in concentration across a distance |
| equilibrium | when the concentration of moelcules is the same on each side of a membrane |
| osmosis | when water molecules diffuse from an area of higher concentration to a lower one |
| hypotonic | when concentation of molecules on one side of the membrane is lower than that on the other side |
| hypertonic | when the concentation of molecules on one side of the membrane is higher than that on the other side |
| isotonic | when the concentration of molecules on both sides of the membrane are equal |
| turgor pressure | the pressure that water molecules exert on the cell wall |
| plasmolysis | when turgor pressure decreases, and the cell shrinks away from the cell wall |
| cytolysis | the bursting of cells when turgor pressure becomes too great |
| facilitated diffusion | the diffusion of molecules using carrier protiens. for molecules that cannot dissolve in lipids or are too large to pass thorugh pores in the cell's membrane |
| carrier proteins | proteins that assist in the diffusion of molecules from a higher concentration to a lower one |
| ion channels | the diffusion of specific ions through their specific channel. some have gates |
Combine with other sets
Share on Facebook
Share on MySpace