[Solved] What kind of reaction is the formation of oxaloacetate from phosphoenolpyruvate? A) catabolic B) anaplerotic C) decarboxylation D) dehydrogenation E) co-factor induced Leptin: A hormone produced by fat cells that helps to regulate energy balance by inhibiting hunger. Major Mineral: Essential minerals required by the body in relatively large amounts for various physiological functions. Copper: A chemical element with the symbol Cu and atomic number 29, known for its high thermal and electrical conductivity, commonly used in electrical equipment and plumbing. Total Metabolic Rate: The total amount of energy expended by an organism in a given time period to maintain all bodily functions while at rest.