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Biology: Chapter 5.2
Chapter 5.2 Vocabulary
| Term | Definition |
|---|---|
| Active Transport | the movement of materials from an area of lower concentration to an area of higher concentration; requires a cell to expend energy |
| Sodium-Potassium Pump | a carrier protein; transports Na+ ions and K+ ions up their concentration gradients |
| Endocytosis | the process by which cells ingest external fluid, macromolecules, and large particles, including other cells |
| Vesicle | a membrane-bound organelle |
| Pinocytosis | involves the transport of solutes or fluids |
| Phagocytosis | the movement of large particles or whole cells |
| Phagocyte | certain cells in animals use phagocytosis to ingest bacteria and viruses that invade the body |
| Exocytosis | the process by which a substance is released form the cell through a vesicle that transports the substance to the cell surface and then fuses with the membrane to let the substance out of the cell |