the data also suggest that the feline pulmonary vascular bed is functionally innervated by cholinergic nerves , and that vagal stimulation dilates the pulmonary vascular bed by releasing acetylcholine , which acts on muscarinic receptors in pulmonary vessels . alpha and beta 2-adrenoceptors appear to be present in the feline pulmonary vascular bed , and both types of adrenergic receptors are innervated by the sympathetic nervous system .
C0001643
beta 2-adrenoceptors
C0034783
adrenergic receptors