title: The question of cholinergic antagonism.
mesh_terms: D000109:Acetylcholine / Q000031:analogs & derivatives / Q000494:pharmacology; D000818:Animals; D001285:Atropine / Q000494:pharmacology; D001665:Binding Sites / Q000187:drug effects; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects / Q000502:physiology; D066298:In Vitro Techniques; D008968:Molecular Conformation; D009119:Muscle Contraction / Q000187:drug effects; D011950:Receptors, Cholinergic / Q000187:drug effects*; D013113:Spin Labels
chemical_list: D011950:Receptors, Cholinergic; D013113:Spin Labels; D001285:Atropine; D000109:Acetylcholine