title: Multiple pacemaker sites in spontaneously active vascular muscle.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D004566:Electrodes; D004594:Electrophysiology; D066298:In Vitro Techniques; D008722:Methods; D009130:Muscle, Smooth / Q000187:drug effects / Q000502:physiology*; D011169:Portal Vein / Q000187:drug effects / Q000502:physiology; D011188:Potassium / Q000494:pharmacology; D051381:Rats
chemical_list: D011188:Potassium; D002118:Calcium