Peculiarities of cholinergic regulation of smooth muscles in rabbit pulmonary arteries
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Cholinergic contractile reactions of smooth muscles in rabbit pulmonary arteries were studied by mechanography. The muscarinic receptor agonist pilocarpine induced biphasic relaxation of mesatone- or potassium-precontracted segments from lobar pulmonary arteries with intact endothelium. The low-threshold endothelium-dependent component of pilocarpine-induced relaxation was suppressed by denudation or nitric oxide synthase blocker L-NAME.
Key Wordspulmonary arteries endothelium nitric oxide
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