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Questions and Answers
What occurs when the lung alveolar air pressure exceeds the capillary blood pressure?
What occurs when the lung alveolar air pressure exceeds the capillary blood pressure?
- The capillaries remain unchanged, maintaining blood flow
- The capillaries rupture, causing hemorrhage
- The capillaries close, stopping blood flow (correct)
- The capillaries dilate, increasing blood flow
In which zone of pulmonary blood flow is there no blood flow during any part of the cardiac cycle?
In which zone of pulmonary blood flow is there no blood flow during any part of the cardiac cycle?
- Zone 3
- Zone 4
- Zone 1 (correct)
- Zone 2
What is the characteristic of blood flow in Zone 2 of the lungs?
What is the characteristic of blood flow in Zone 2 of the lungs?
- Intermittent blood flow during peaks of pulmonary arterial pressure (correct)
- No blood flow during the entire cardiac cycle
- Continuous blood flow throughout the cardiac cycle
- Reversed blood flow during diastole
What is the typical pattern of pulmonary blood flow in a normal lung?
What is the typical pattern of pulmonary blood flow in a normal lung?
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What is the determining factor for the flow of blood in the lungs?
What is the determining factor for the flow of blood in the lungs?
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In which zone of the lung is the blood flow continuous throughout the cardiac cycle?
In which zone of the lung is the blood flow continuous throughout the cardiac cycle?
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