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Cell Transport and H
3.3
| Term | Definition |
|---|---|
| Active transport | movement of substances across a plasma membrane that requires energy |
| Diffusion | type of passive transport that does not require the help of transport proteins |
| Endocytosis | type of vesicle transport that moves substances into a cell |
| Exocytosis | type of vesicle transport that moves substances out of all cell |
| Facilitated diffusion | diffusion with the help of transport proteins |
| Osmosis | diffusion of water molecules across a membrane |
| Passive transport | movement of substances across a plasma membrane that does not require energy |
| Sodium-potassium pump | type of active transport in which sodium ions are pumped out of the cell and potassium ions are pumped into the cell with the help of a carrier protein and energy from ATP |
| Transport protein | protein in a plasma membrane that helps other substances cross the membrane |
| Vesicle | small saclike organelle that stores and transports materials inside a cell |