The inducement of tone and its inhibition in isolated tracheal muscle.
D000818:Animals; D001285:Atropine / Q000494:pharmacology; D001993:Bronchodilator Agents / Q000494:pharmacology; D004837:Epinephrine / Q000494:pharmacology; D000431:Ethanol / Q000494:pharmacology; D006168:Guinea Pigs; D066298:In Vitro Techniques; D007545:Isoproterenol / Q000494:pharmacology*; D009119:Muscle Contraction / Q000187:drug effects*; D009129:Muscle Tonus; D009638:Norepinephrine / Q000494:pharmacology; D010208:Papaverine / Q000494:pharmacology; D013806:Theophylline / Q000494:pharmacology; D014132:Trachea / Q000187:drug effects*
D001993:Bronchodilator Agents; D000431:Ethanol; D001285:Atropine; D013806:Theophylline; D010208:Papaverine; D007545:Isoproterenol; D009638:Norepinephrine; D004837:Epinephrine