| A | B |
|---|
| diffusion | movement of molecules from a high concentration to a low concentration |
| osmosis | diffusion of water through a membrane |
| plasmolysis | shrinking of a cell due to loss of water by osmosis |
| passive transport | molecules move by diffusion through open protein door; no energy used |
| active transport | molecules move through locked protein doors from low to high concentration; uses energy |
| phospholipid | one of the molecules that make up the cell membrane; small molecules diffuse through |
| endocytosis | a process used to move large molecules into the cell |
| exocytosis | Golgi complex forms a vesicle around a large molecule so the molecule can leave the cell |
| selectively permeable membrane | a membrane which allows some, but not all, materials to pass through it |
| examples of molecules which pass through phospholipids | oxygen, carbon dioxide, water |
| receptor molecule | protein on cell surface that identifies molecules by their shape |
