title: Morphine and autonomic control of the sinus node.
mesh_terms: D000818:Animals; D001285:Atropine / Q000494:pharmacology; D001341:Autonomic Nervous System / Q000187:drug effects* / Q000502:physiology; D001919:Bradycardia / Q000139:chemically induced; D004285:Dogs; D006339:Heart Rate / Q000187:drug effects*; D007275:Injections, Intravenous; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology*; D010275:Parasympathetic Nervous System / Q000187:drug effects; D012110:Reserpine / Q000494:pharmacology; D012849:Sinoatrial Node / Q000187:drug effects* / Q000502:physiology; D013431:Sulfates / Q000494:pharmacology; D013564:Sympathetic Nervous System / Q000187:drug effects; D014628:Vagotomy; D014630:Vagus Nerve / Q000187:drug effects / Q000502:physiology
chemical_list: D013431:Sulfates; D009020:Morphine; D001285:Atropine; D012110:Reserpine