title: A preliminary study about the effect of urea on frog ventricular strip.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D001001:Anura; D004305:Dose-Response Relationship, Drug; D006321:Heart / Q000187:drug effects*; D006352:Heart Ventricles / Q000187:drug effects; D009200:Myocardial Contraction / Q000187:drug effects; D011893:Rana esculenta; D014508:Urea / Q000494:pharmacology*
chemical_list: D014508:Urea; D000109:Acetylcholine