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.
1. Vitamin B12 assists an important step of the One-carbon cycle. The proper functioning of the central nervous system is dependent on One-carbon metabolism that takes place in the brain. The One-carbon cycle actually includes a series of biochemical reactions that occur in every cell of the human body.