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Questions and Answers
What is the normal mean pressure in the human pulmonary artery?
What is the normal mean pressure in the human pulmonary artery?
- 8 mm Hg
- 20 cm of water
- 15 mm Hg (correct)
- 25 mm Hg
What is the normal value for Normal Dlco?
What is the normal value for Normal Dlco?
- 15 ml/min/mmHg
- 30 ml/min/mmHg
- 25 ml/min/mmHg (correct)
- 0 ml/min/mmHg
How long does each red blood cell spend in the capillary network for complete equilibration of oxygen and carbon dioxide?
How long does each red blood cell spend in the capillary network for complete equilibration of oxygen and carbon dioxide?
- 1 sec
- 2 sec (correct)
- 3 sec
- 4 sec
Why are the walls of pulmonary arteries remarkably thin?
Why are the walls of pulmonary arteries remarkably thin?
What is the primary source of blood supply to the conducting airways up to the terminal bronchioles?
What is the primary source of blood supply to the conducting airways up to the terminal bronchioles?
What mainly triggers inspiration during the ventilation process?
What mainly triggers inspiration during the ventilation process?
How does the caliber of alveolar vessels get determined?
How does the caliber of alveolar vessels get determined?
What happens to pulmonary vascular resistance when cardiac output increases?
What happens to pulmonary vascular resistance when cardiac output increases?
What is the primary mechanism that helps optimize gas exchange by decreasing blood flow to poorly oxygenated alveoli?
What is the primary mechanism that helps optimize gas exchange by decreasing blood flow to poorly oxygenated alveoli?
If alveolar PO2 drops below what level, vasoconstriction may occur as part of the active control of the pulmonary circulation?
If alveolar PO2 drops below what level, vasoconstriction may occur as part of the active control of the pulmonary circulation?
What process involves optimizing gas exchange by decreasing blood flow to poorly oxygenated alveoli?
What process involves optimizing gas exchange by decreasing blood flow to poorly oxygenated alveoli?
What happens to blood flow in poorly oxygenated alveoli when the alveolar PO2 is very low?
What happens to blood flow in poorly oxygenated alveoli when the alveolar PO2 is very low?
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