6 Questions
What occurs when the lung alveolar air pressure exceeds the capillary blood pressure?
The capillaries close, stopping blood flow
In which zone of pulmonary blood flow is there no blood flow during any part of the cardiac cycle?
Zone 1
What is the characteristic of blood flow in Zone 2 of the lungs?
Intermittent blood flow during peaks of pulmonary arterial pressure
What is the typical pattern of pulmonary blood flow in a normal lung?
Both Zone 2 and Zone 3 blood flow
What is the determining factor for the flow of blood in the lungs?
The difference between alveolar air pressure and capillary blood pressure
In which zone of the lung is the blood flow continuous throughout the cardiac cycle?
Zone 3
Learn about the three possible zones of pulmonary blood flow in normal and pathological lung conditions, including the factors that affect blood flow in the alveolar capillaries. Understand the relationship between alveolar air pressure and capillary blood pressure.
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