Cell Membrane - AP Biology Flashcards
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| 5220090789 | Selectively permeability | it allows some things to come through and some not |  | 0 |
| 5220090790 | Osmosis | Diffusion of water through a selectively permeable membrane |  | 1 |
| 5220090791 | turgid | swollen as from a fluid; bloated |  | 2 |
| 5220090792 | Amphipathic molecule | A molecule that has both a hydrophilic region and a hydrophobic region. |  | 3 |
| 5220090793 | flaccid | This happens when water moves, but the amount within the cell is constant; no pressure builds. |  | 4 |
| 5220090794 | fluid mosaic model | The currently accepted model of cell membrane structure, which envisions the membrane as a mosaic of individually inserted protein molecules drifting laterally in a fluid bilayer of phospholipids. |  | 5 |
| 5220090795 | Intergral proteins | Proteins that go all the way through the membrane |  | 6 |
| 5220090796 | plasmolysis | This happens when a cell shrinks inside its cell wall while the cell wall remains intact. |  | 7 |
| 5220090797 | transport proteins | A transmembrane protein that helps a certain substance or class of closely related substances to cross the membrane. |  | 8 |
| 5220090798 | facilitated diffusion | A process in which substances are transported across a plasma membrane with the concentration gradient with the aid of carrier (transport) proteins; does not require the use of energy. |  | 9 |
| 5220090799 | concentration gradient | difference in concentration of a substance on two sides of a membrane |  | 10 |
| 5220090800 | Active transport | Energy-requiring process that moves material across a cell membrane against a concentration difference |  | 11 |
| 5220090801 | passive transport | Requires NO energy, Movement of molecules from high to low concentration, Moves with the concentration gradient |  | 12 |
| 5220090802 | sodium-potassium pump | a carrier protein that uses ATP to actively transport (3) sodium ions out of a cell and (2) potassium ions into the cell |  | 13 |
| 5220090803 | hypertonic | (of a solution) having a higher osmotic pressure than a comparison solution |  | 14 |
| 5220090804 | hypotonic | Having a lower concentration of solute than another solution |  | 15 |
| 5220090805 | exocytosis | A process in which a cell releases substances to the extracellular environment by fusing a vesicular membrane with the plasma membrane, separating the membrane at the point of fusion and allowing the substance to be released. |  | 16 |
| 5220090806 | isotonic | Having the same solute concentration as another solution. (or same osmotic pressure) |  | 17 |
| 5220090807 | endocytosis | A process in which a cell engulfs extracellular material through an inward folding of its plasma membrane. |  | 18 |
| 5220090808 | gated channels | A protein channel in a cell membrane that opens or closes in response to a particular stimulus. |  | 19 |