What of the following factors cause a reduction in the pulmonary vascular resistance following the first breath?I. Increased alveolar pressure of oxygenII. Removal of lung fluid which reduces pressure on pulmonary vesselsIII. Increase in lung volume, which widens the caliber of extralveolar vessels
?
A. I, II, and III
B. II and III only
C. I only
D. I and II only
Answer: A
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Answer the following statement true (T) or false (F)
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