| A | B |
|---|
| diffusion | movement of molecules from concentration that is high to one that is low |
| selectively permeable membrane | allows some molecules to pass but not all |
| concentration gradient | measure of the difference in concentrations |
| osmosis | movement of water through a membrane |
| hypotonic | low solute concentration, high water |
| hypertonic | high solute concentration, low water |
| isotonic | two concentrations that are equal |
| solute | dissolved substance |
