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.
These bundles are made of long but thin individual cells, embedded in a covering. Muscle fibers are synapsed by axons that trigger them to function. However, it is the metabolism of sugars and fats â chemical energy â that drives muscle cells. Fat Metabolism Fat metabolism is the primary source of energy during ordinary muscle use. Fat metabolism requires oxygen. Intense muscle usage requires more oxygen than the body can immediately provide. When required, the body produces energy, though less efficiently, by means of anaerobic processes â processes that do not require oxygen. Fat metabolism is one form of chemical energy.