A 24-year-old research student is evaluating the physiology of pulmonary ventilation and perfusion. Which of the following best represents the change in pulmonary ventilation and perfusion from apex to base in the upright patient?
↑ Perfusion (Q); ↑ Ventilation (V); ↑ Ventilation/Perfusion (V/Q)
↑ Perfusion (Q); ↑ Ventilation (V); ↓ Ventilation/Perfusion (V/Q)
↑ Perfusion (Q); ↓ Ventilation (V); ↑ Ventilation/Perfusion (V/Q)
↑ Perfusion (Q); ↓ Ventilation (V); ↓ Ventilation/Perfusion (V/Q)
↑ Perfusion (Q); ↔ Ventilation (V); ↓ Ventilation/Perfusion (V/Q)
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Cut-to-the-chase Answer (0:23):
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HY USMLE Answer (1:36):
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