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Chemical Reactions
Synthesis reaction- when atoms or molecules combine to form a larger or more complex molecule. These reactions are the basis of constructive activities in body cells.
Decomposition reaction- when a molecule is broken down into smaller molecules or atoms. These are the reverse of synthesis reactions and bonds are broken instead of created.
Exchange reaction- involves both synthesis and decomposition reactions. Bonds are both created and broken. Parts of the reactant molecules change partners to produce different product molecules.
Oxidation reduction reactions- decomposition reactions that are the basis of all reactions in which foods are catabolized for energy. In this reaction electrons are exchanged between the reactants. The reactant that loses the electron is the donor and becomes oxidized; the reactant receiving the electron is known as the acceptor and is reduced.