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Metabolism

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Metabolism (, from Greek: μεταβολή metabolē, "change") is the set of life-sustaining chemical reactions in organisms. The three main purposes of metabolism are: the conversion of the energy in food to energy available to run cellular processes; the conversion of food to building blocks for proteins, lipids, nucleic acids, and some carbohydrates; and the elimination of metabolic wastes. These enzyme-catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments. The word metabolism can also refer to the sum of all chemical reactions that occur in living organisms, including digestion and the transportation of substances into and between different cells, in which case the above described set of reactions within the cells is called intermediary (or intermediate) metabolism.

Metabolism - Wikipedia Jump to content From Wikipedia, the free encyclopedia Set of chemical reactions in organisms "Cellular metabolism" redirects here. For the journal, see Cell Metabolism . For calories burned at rest, see Basal metabolic rate . For other uses, see Metabolism (disambiguation) . Simplified view of cellular metabolism Part of a series on Biochemistry Index Outline History Key components Biomolecules Enzymes Gene expression Metabolism List of biochemists Biochemist List of biochemists Biomolecule families Carbohydrates Alcohols Glycoproteins Glycosides Lipids Eicosanoids Fatty

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