title: Possible existence of "spare" beta-receptors in rat tracheal smooth muscle.
mesh_terms: D000319:Adrenergic beta-Antagonists; D000345:Affinity Labels; D000818:Animals; D002217:Carbachol / Q000494:pharmacology; D005029:Ethylenediamines; D005260:Female; D066298:In Vitro Techniques; D007545:Isoproterenol / Q000494:pharmacology; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000378:metabolism*; D051381:Rats; D011941:Receptors, Adrenergic / Q000378:metabolism*; D011943:Receptors, Adrenergic, beta / Q000378:metabolism*; D014132:Trachea / Q000378:metabolism
chemical_list: D000319:Adrenergic beta-Antagonists; D000345:Affinity Labels; D005029:Ethylenediamines; D011941:Receptors, Adrenergic; D011943:Receptors, Adrenergic, beta; D002217:Carbachol; D007545:Isoproterenol