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3.3 p2
| 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 a 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 transport | type of active transport in which substances are carried across the cell membrane by vesicles |