| A | B |
|---|
| Passive Transport | Materials move without using the cell's energy |
| Osmosis | The diffusion of water through a membrane |
| Active transport | The process of using energy to move materials through a membrane |
| Diffusion | Molecules spread out, or move from areas where there are many of them to areas where there are fewer of them |
| Concentration | The number of particles of that substance in specific volume |
| Endocytosis | Occurs when a large bit of material is captured within a pocket of the membrane |
| Exocytosis | Occurs when a membrane within the cell encloses the material that needs to be removed |
| Cell membrane | A protective covering that encloses the entire cell. Any material coming into or out of the cell must pass through the cell membrane. |
