title: Desensitization of bullfrog atrium muscle to the muscarinic action of acetylcholine on its action potential.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology*; D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D001001:Anura; D016275:Atrial Function; D006325:Heart Atria / Q000187:drug effects; D011892:Rana catesbeiana / Q000502:physiology*
chemical_list: D000109:Acetylcholine