How Does Lung Perfusion Work in Ventilation-Perfusion Coupling

question 71

Multiple Choice

How does lung perfusion work in ventilation-perfusion coupling?

• A) If partial pressure of carbon dioxide increases, the bronchioles dilate.
• B) Air flow is directed to lobules where partial pressure of carbon dioxide is high.
• C) If partial pressure of carbon dioxide decreases, the bronchioles constrict.
• D) Alveolar capillaries constrict where the partial pressure of oxygen is low, so blood is diverted to where the partial pressure of oxygen is high.

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