title: Are increases in cyclic GMP levels responsible for the effects of acetylcholine on the transmembrane action potential of cat atrium?
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology*; D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D002415:Cats; D006152:Cyclic GMP / Q000378:metabolism*; D005260:Female; D006321:Heart / Q000187:drug effects*; D066298:In Vitro Techniques; D008297:Male; D008564:Membrane Potentials / Q000187:drug effects; D009200:Myocardial Contraction / Q000187:drug effects; D009206:Myocardium / Q000378:metabolism*; D009599:Nitroprusside / Q000494:pharmacology
chemical_list: D009599:Nitroprusside; D006152:Cyclic GMP; D000109:Acetylcholine