In the Upright Position, the Ratio Between Ventilation and Blood

question 3

Multiple Choice

In the upright position, the ratio between ventilation and blood flow in the lungs is

• A)ventilation exceeds blood flow anterior to posterior.
• B)ventilation exceeds blood flow by 2:1 to 3:1 in the upper zones.
• C)ventilation exceeds blood flow by 2:1 to 3:1 in the lower zones.
• D)mixed uniformly from top to bottom.

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