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Chapter 5.2 Vocab
| Active Transport | the movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy |
| Sodium- Potassium Pump | a carrier protein that uses ATP to actively transport sodium ions out of a cell and potassium ions into the cell |
| Endocytosis | the process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell |
| Vesicle | a small cavity or sac that contains materials in a eukaryotic cell; forms when part of the cell membrane surrounds the materials to be taken into the cell or transported within the cell |
| Pinocytosis | a method of active transport across the cell membrane in which the cell takes in extracellular fluids |
| Phagocyte | a cell that ingests and destroys (digests) foreign matter or microorganisms |
| Phagocytosis | the process by which a cell engulfs large particles or whole cells, either as a defense mechanism or as a means to obtain food |
| Exocytosis | the process by which a substance is released from the cell through a vesicle that transports the substance to the cell surface and then fuses with the membrane to let the substance out |
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hoffmand19
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