Blockage of the pulmonary arterial circulation to a portion of the lung would cause which of the following?

Question

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Blockage of the pulmonary arterial circulation to a portion of the lung would result in a decrease in blood flow to that region of the lung. This would cause an increase in alveolar dead space since the alveoli in that region won't receive an adequate supply of blood and won't participate in gas exchange. Anatomical dead space refers to the portion of the airways which do not participate in gas exchange, while physiologic dead space comprises anatomical dead space and any additional alveoli that are not functioning effectively in gas exchange. Thus, there won't be any change in anatomical or physiologic dead space due to a blockage of the pulmonary arterial circulation.

Blockage of the Pulmonary Arterial Circulation to a Portion of the Lung