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ELL Biology Ch 4
Cells and Energy
Term | Definition |
---|---|
ATP | a form of chemical energy that can be used by a cell to carry out life processes |
diffusion | the movement of a substance from an area that is crowded to an area that is less crowded |
semipermeable | having tiny pores or holes so that only certain molecules can pass through |
osmosis | the movement of water through a cell membrane |
passive transport | the movement of materials through a cell membrane without using energy |
active transport | the movement of materials through a cell membrane using energy |
cellular respiration | the process by which cells release energy from food |
photosynthesis | the process by which plant cells use carbon dioxide, water, and light energy to make food |
chlorophyll | a substance in chloroplasts that absorbs light energy |
energy | the ability to do work and cause change |