| A | B |
|---|
| Drives molecules from area of low concentration to high concentration | active transport |
| diffusion of water | osmosis |
| concentration of a solution is same as inside cell | isotonic |
| boundary between a cell and the outside environmnent | cell membrane |
| molecule that makes up the cell membrane | phospholipid |
| molecule that strengthens cell membrane | cholesterol |
| Cell allows some, but not all, materials to cross | selective permeability |
| protein that detects a signal molecule and performs an response action | receptor |
| movement of molecules in a fluid from region of higher concentration to area of lower concentration | diffusion |
| difference in one substance concentration in a location to another | concentration gradient |
| movement of molecules across a cell membrane without using energy | passive transport |
| diffusion of molecules across a cell membrane aided by transport proteins | facilitated diffusion |
| process of taking liquids or large molecules into a cell by engulfing them | endocystosis |
| molecule that is broken down to produce energy in a cell | ATP |
| type of energy used by active transport proteins | chemical energy |
| release of substances from a cell by fusion of a vesicle with a cell membrane | exocytosis |
| solution that has a lower concentration of dissolved particles than a cell | hypotonic |
| solution that has a higher concentration of dissolved solids than a cell | hypertonic |
| engulfing of very large particles, such as bacteria | phagocytosis |
| process in which liquid is taken into a cell | pinocytosis |
| another name for a transport protein | pump |
| pocket becomes this as it breaks away into a cell | vacuole |
| This breaks down a vacuole in a cell | lysosome |
| white blood cell that helps destroy foreign matter such as bacteria | macrophage |
