Most potent vasoconstrictor of the pulmonary aery is:
Correct Answer: Hypoxia
Description: Endothelin, urotensin, angiotensin are the potent constrictors of the systemic vessels. In case of the pulmonary vessels, hypoxia is the strongest vasoconstrictor, acting the O2-sensitive K+ channels in the pulmonary vascular smooth muscle cells (VSMCs).
Category:
Physiology
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