our functional studies using the muscarinic antagonists 4-diphenylacetoxy-n-methylpiperidine ( 4-damp ) , methoctramine and pirenzepine have demonstrated that the muscarinic receptor on the rat pulmonary artery endothelium which mediates vasodilation is of the m3 subtype and can not account for the high proportion of m1 receptors identified in lung homogenates .
C0034052
pulmonary artery
C0024109
lung