Podcast
Questions and Answers
What is the main cause of the development of pulmonary edema?
What is the main cause of the development of pulmonary edema?
- Decreased pulmonary arterial pressure
- Increased left atrial pressure exceeding plasma colloid osmotic pressure (correct)
- Decreased interstitial fluid colloid osmotic pressure
- Increased systemic vascular resistance
What happens when alveolar O2 decreases to ~70% of normal?
What happens when alveolar O2 decreases to ~70% of normal?
- Pulmonary capillary pressure decreases
- Pulmonary arterial pressure increases
- Adjacent vessels dilate, decreasing resistance by 5x
- Adjacent vessels constrict, increasing resistance by 5x (correct)
What is the mean pulmonary capillary pressure?
What is the mean pulmonary capillary pressure?
- About 28 mm Hg
- About 7 mm Hg (correct)
- About 23 mm Hg
- About 14 mm Hg
What happens to the pulmonary capillaries when alveoli apply little to no pressure at end-exhalation?
What happens to the pulmonary capillaries when alveoli apply little to no pressure at end-exhalation?
What is the main effect of alveolar vs extra-alveolar vessels on pulmonary vascular resistance?
What is the main effect of alveolar vs extra-alveolar vessels on pulmonary vascular resistance?
What happens to the resistance when alveolar O2 decreases to ~70% of normal?
What happens to the resistance when alveolar O2 decreases to ~70% of normal?
What happens to the cardiac output during exercise?
What happens to the cardiac output during exercise?
What is the main accommodation to increased cardiac output?
What is the main accommodation to increased cardiac output?
What are the outward fluid pressures from capillaries into interstitium?
What are the outward fluid pressures from capillaries into interstitium?
What happens as left atrial pressure rises in the development of pulmonary edema?
What happens as left atrial pressure rises in the development of pulmonary edema?
What is the effect of increased left atrial pressure exceeding plasma colloid osmotic pressure?
What is the effect of increased left atrial pressure exceeding plasma colloid osmotic pressure?
Which of the following best describes the major functions of the bronchial circulation?
Which of the following best describes the major functions of the bronchial circulation?
In which zone of the lung do alveolar pressure exceed pulmonary vascular pressure?
In which zone of the lung do alveolar pressure exceed pulmonary vascular pressure?
How does pulmonary vascular resistance change with alterations in cardiac output or pulmonary arterial pressure?
How does pulmonary vascular resistance change with alterations in cardiac output or pulmonary arterial pressure?
What is the consequence of hypoxic pulmonary vasoconstriction on the distribution of pulmonary blood flow?
What is the consequence of hypoxic pulmonary vasoconstriction on the distribution of pulmonary blood flow?
How does inspired nitric oxide affect pulmonary vascular resistance and hypoxic vasoconstriction?
How does inspired nitric oxide affect pulmonary vascular resistance and hypoxic vasoconstriction?
Which of the following best describes the regional differences in pulmonary blood flow in an upright person?
Which of the following best describes the regional differences in pulmonary blood flow in an upright person?
What describes zone two in the lung with respect to pulmonary vascular pressure and alveolar pressure?
What describes zone two in the lung with respect to pulmonary vascular pressure and alveolar pressure?
How does pulmonary vascular resistance change with alterations in lung volume?
How does pulmonary vascular resistance change with alterations in lung volume?
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