title: Regional differences in the response to substance P on the longitudinal muscle and the concentration of substance P in the digestive tract of the guinea-pig.
mesh_terms: D000818:Animals; D001285:Atropine / Q000494:pharmacology; D003106:Colon / Q000032:analysis; D004064:Digestive System / Q000032:analysis* / Q000187:drug effects; D004068:Digestive System Physiological Phenomena; D004947:Esophagus / Q000032:analysis; D006168:Guinea Pigs; D007421:Intestine, Small / Q000032:analysis; D009119:Muscle Contraction / Q000187:drug effects*; D009130:Muscle, Smooth / Q000187:drug effects*; D009928:Organ Specificity; D011863:Radioimmunoassay; D012007:Rectum / Q000032:analysis; D013270:Stomach / Q000032:analysis; D013373:Substance P / Q000032:analysis* / Q000494:pharmacology; D014018:Tissue Distribution
chemical_list: D013373:Substance P; D001285:Atropine