| A | B |
|---|
| diffusion | movement of any particle from high to low |
| osmosis | diffusion of water across a cell membrane |
| passive transport | diffusion of particles through protein doorways from HIGH to LOW concentration |
| active transport | movement of particles through a protein doorway from LOW to HIGH concentrations |
| endocytosis | process in which a cell membrane surrounds a particle and brings it in to a cell |
| exocytosis | process used to remove large particles from a cell |
