| A | B |
|---|
| Diffusion | Movement of particles from high to low concentration |
| Osmosis | Movement of water across a semipermeable membrane from high to low concentration |
| Isotonic solution | amount of water entering the cell is equal to the amount leaving the cell |
| What happens in a hypertonic solution? | water moves out of the cell |
| Hypertonic solution | greater concentration of solute outside the cell |
| Hypotonic solution | greater concentration of solute inside the cell |
| What happens in a hypotonic solution? | water moves into the cell |
| Active transport | process that requires energy to move molecules across the cell membrane |
