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chapter 1
cell structures and functions
| Question | Answer |
|---|---|
| selectively permeable | some supstances can pass through and others cannot |
| diffusion | the main method by which small molecules move across the cell membrane |
| osmosis | the diffusion of water molecules through a selectively permiable membrane |
| passive transport | the movement of dissolved materials through a cell membrane without using cellular energy |
| active transport | the movement of materials through the cell membrane using cellular energy |