title: Effect of external Na and K on tonus and drug-induced contractions of pulmonary artery strip from rabbits, particularly in relation to Ca.
mesh_terms: D000818:Animals; D002118:Calcium / Q000502:physiology*; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects*; D009129:Muscle Tonus / Q000187:drug effects*; D009130:Muscle, Smooth / Q000187:drug effects*; D011188:Potassium / Q000494:pharmacology*; D011651:Pulmonary Artery; D011817:Rabbits; D012964:Sodium / Q000494:pharmacology*
chemical_list: D012964:Sodium; D011188:Potassium; D002118:Calcium