Are restoring forces important to relaxation?
D000818:Animals; D002118:Calcium / Q000502:physiology; D004734:Energy Metabolism; D006321:Heart / Q000502:physiology*; D009200:Myocardial Contraction; D009206:Myocardium / Q000378:metabolism / Q000648:ultrastructure; D009210:Myofibrils / Q000502:physiology
D002118:Calcium