title: Effect of morphine on the SA node of the dog.
mesh_terms: D000109:Acetylcholine / Q000037:antagonists & inhibitors / Q000494:pharmacology; D000818:Animals; D001285:Atropine / Q000494:pharmacology; D003864:Depression, Chemical; D004285:Dogs; D004558:Electric Stimulation; D006325:Heart Atria / Q000187:drug effects; D006339:Heart Rate / Q000187:drug effects; D066298:In Vitro Techniques; D009020:Morphine / Q000494:pharmacology*; D011433:Propranolol / Q000494:pharmacology; D012849:Sinoatrial Node / Q000187:drug effects*; D013268:Stimulation, Chemical; D014630:Vagus Nerve / Q000502:physiology
chemical_list: D009020:Morphine; D001285:Atropine; D011433:Propranolol; D000109:Acetylcholine