The purpose of ventilation-perfusion coupling is to match areas of the lungs with high O2 content to capillaries that have higher blood flow. If ventilation is low relative to perfusion, which of the following effects will occur in response to low O₂ levels?
bronchioles constrict
❌
bronchioles dilate
❌
pulmonary arterioles in the area dilate
❌
pulmonary arterioles in the area constrict
✅

Question

The purpose of ventilation-perfusion coupling is to match areas of the lungs with high O2 content to capillaries that have higher blood flow. If ventilation is low relative to perfusion, which of the following effects will occur in response to low O₂ levels?

bronchioles constrict

❌

bronchioles dilate

❌

pulmonary arterioles in the area dilate

❌

pulmonary arterioles in the area constrict

✅

Accepted Answer

pulmonary arterioles in the area constrict

Answer

bronchioles constrict

Answer

bronchioles dilate

Answer

pulmonary arterioles in the area dilate

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The purpose of ventilation-perfusion coupling is to match areas of the lungs wit...

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