Which of the following causes vasodilation in the pulmonary circulation?
Correct Answer: PGI
Description: Substances producing pulmonary vasodilation include nitric oxide, prostacyclins, a2 and b2 adrenergic stimulation, histamine etc. Hypercapnia, hypoxy endothelin I, a1 adrenergic, angiotensin II, thromboxane produce pulmonary vasoconstriction.
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Medicine
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