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Cells (basic info)
cells are the subunits of organisms; lowest level of structure able to perform all functions of life
4 main functions to be an organism
uptake and processing of nutrients, excretion of wastes, response to environmental stimuli, and reproduction
How do organisms obtain energy from fuels such as sugar?
Cells break the molecules down in a series of closely regulated reactions
When muscles need more energy enzymes are used to...?
Catalyze the break down of sugar molecules, releasing energy
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