Medical Dictionary. arrhythmia. play. noun arÂ·rhythÂ·mia \Ä-Ërith-mÄ-É\. Medical Definition of arrhythmia. : an alteration in rhythm of the heartbeat either in time or force.
Central metabolism provides mechanisms for the generation of energy from carbon-energy source catabolism and the production of biosynthetic precursors and intermediates for the anabolic pathways essential to maintain cell structure and function.
Components of metabolic pathways. 1) Process occurs in sequence of chemical reactions 2) Starting compound is converted to intermediate molecules and end products -> precursor metabolites. 3) Precursor metabolites = building blocks used to make subunits of macromolecules, or oxidized to release energy.