title: Tracheal smooth muscle--failure to demonstrate Na-Ca exchange.
mesh_terms: D000818:Animals; D001693:Biological Transport, Active; D002118:Calcium / Q000378:metabolism*; D002417:Cattle; D008094:Lithium / Q000494:pharmacology; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000378:metabolism*; D010042:Ouabain / Q000494:pharmacology; D011188:Potassium / Q000494:pharmacology; D012964:Sodium / Q000378:metabolism*; D014132:Trachea / Q000378:metabolism
chemical_list: D010042:Ouabain; D008094:Lithium; D012964:Sodium; D011188:Potassium; D002118:Calcium