What is the source of energy for muscle contraction?
Hydrolysis of ATP. Intracellular concentrations of ATP are maintained by the action of enzymes such as creatine kinase (CK), adenylate cyclase, and myoadenylate deaminase. The energy to replenish ATP after it is consumed during muscle contraction is provided by intermediary metabolism of carbohydrates and lipids by pathways of glycolysis, the Krebs cycle, β-oxidation, and oxidative phosphorylation
