title: Assay of acetylcholine using toad rectus abdominis muscle in the presence of hemicholinium-like substances.
mesh_terms: D000109:Acetylcholine / Q000032:analysis* / Q000037:antagonists & inhibitors; D000818:Animals; D001001:Anura; D001681:Biological Assay; D066298:In Vitro Techniques; D009025:Morpholines / Q000494:pharmacology*; D009132:Muscles / Q000187:drug effects*
chemical_list: D009025:Morpholines; D000109:Acetylcholine