title: [Effect of isoprenaline and the barium ion on the relaxation of the smooth muscle of the guinea pig trachea].
mesh_terms: D000818:Animals; D001464:Barium / Q000494:pharmacology*; D005576:Colforsin / Q000494:pharmacology; D000242:Cyclic AMP / Q000378:metabolism; D006168:Guinea Pigs; D066298:In Vitro Techniques; D007477:Ions; D007545:Isoproterenol / Q000494:pharmacology*; D009119:Muscle Contraction / Q000187:drug effects*; D009126:Muscle Relaxation / Q000187:drug effects*; D009130:Muscle, Smooth / Q000378:metabolism / Q000502:physiology*; D014132:Trachea / Q000502:physiology
chemical_list: D007477:Ions; D005576:Colforsin; D001464:Barium; D000242:Cyclic AMP; D007545:Isoproterenol