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Many things. Metabolizing nutrients, producing and exporting products the body needs, fighting off infections and toxins, regulating the flow of various substances through the cell membrane in both directions.

2006-10-22 17:21:15 · answer #1 · answered by PaulCyp 7 · 0 0

Depending on the cell; they are doing what they are programmed to do. Stomach cells are making gastric acid, leaf cells are photosynthesizing, fat cells are storing or releasing fatty acids.

2006-10-22 17:25:09 · answer #2 · answered by Nihontitan 2 · 0 0

Just sitting around eating and watching television. Some might be reading in the other room.....:)

2006-10-22 17:16:52 · answer #3 · answered by rasckal 3 · 0 0

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