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.
The by-products of cellular respiration are water and carbon  dioxide. The water is produced at the end of the electron transport  chain by the union of oxygen with electronâ¦s and protons (hydrogen  ions) while the carbon dioxide is a by-product of the Kreb's cycle  and pyruvate decarboxylation.