| A | B |
|---|
| passive transport | movement of molecules across the cell membrane without energy input from the cell |
| diffusion | movement of dissolved molecules in a fluid or gas from a region of higher concentration to a region of lower concentration |
| concentration gradient | difference in the concentration of a substance from one location to another |
| osmosis | diffusion of water molecules across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration |
| isotonic | solution that has an equal concentration of dissolved particles compared with another solution |
| hypertonic | solution that has a higher concentration of dissolved particles compare with another solution |
| hypotonic | solution that has a lower concentration of dissolved particles compare with another solution |
| facilitated diffusion | diffusion of molecules assisted by protein channels that pierce a cell membrane |
