| Term | Definition |
| osmosis | the diffusion of water through a semipermeable membrane |
| diffusion | the movement of particles from a higher concentration to a lower concentration |
| facilitated diffusion | movement of molecules across a cell membrane through protein channels |
| active transport | the movement of particles from a lower concentration to a higher concentration using energy |
| isotonic | situation in which the concentration of two solutions is equal |
| hypertonic | the solution with a greater solute concentration |
| hypotonic | the solution with a lesser solute concentration |
| solvent | the part of a solution that does the dissolving |
| solute | the part of a solution that is dissolved |
| solution | a uniform mixture of a solute in a solvent |