| A | B |
|---|
| diffusion | movement down a concentration gradient |
| concentration gradient | change in conc. over distance |
| active transport | use ENERGY (ATP) |
| passive Transport | No need for ENERGY (ATP) |
| carrier protein | facilitated diffusion |
| channel protein | helps a polar substance diffuse |
| carbohydrates on proteins | Flags that identify the cell |
| Na/K pump | form of Active Transport |
| against a concentration gradient | active transport |
| hypertonic | high salt |
| hypotonic | low salt or distilled water |
| isotonic | Just Right |
| equilibrium | no net change |
| membrane | lipid bilayer |
| phospholipid | makes up the cell membrane |
