title: Smooth muscle: introduction.
mesh_terms: D000200:Action Potentials; D000818:Animals; D006801:Humans; D007473:Ion Channels / Q000378:metabolism; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000166:cytology / Q000378:metabolism / Q000502:physiology*; D009131:Muscle, Smooth, Vascular / Q000502:physiology
chemical_list: D007473:Ion Channels