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Untitledcell transpo
| Term | Definition |
|---|---|
| selectively permeable | some things let in, some things kept out. |
| cell membranes | are selectively permeable |
| example of selectively permeable | a window screen |
| diffusion | the movement of molecules from an area of high concentration to an area of low concentration |
| diffusion examples- | food dye in water, perfume in the air, sugar cube in water |
| osmosis | is the diffusion of water through a cell membrane |
| examples of osmosis | salt water will draw water out of cells, fresh water will move into cells |
| passive transport | high to low concentration does NOT use energy |
| facilitated diffusion | when a transport protein acts as a gate for large molecules to diffuse through |
| active transport | low to high concentration USES ENERGY |
| endocytosis |