10 Questions
What is the PO2 of oxygen-poor blood entering the pulmonary capillaries at rest?
40 mm Hg
In which direction does oxygen diffuse along its partial pressure gradient in the alveolus?
From the alveolus into the blood
What is the PCO2 of the alveolar air?
40 mm Hg
What happens to the PCO2 of the blood as it flows past the alveolus?
It decreases
What is the purpose of ventilation-perfusion coupling?
To maintain alveolar airflow proportional to pulmonary capillary blood flow
What process occurs simultaneously with the loading of oxygen into the blood?
Unloading of carbon dioxide from the blood
What is the result of the partial pressure gradient of oxygen in the alveolus?
Oxygen diffuses into the blood
What is the primary function of the alveolus?
To facilitate the exchange of gases between the lungs and the environment
What is the difference between the PCO2 of the alveolar air and the PCO2 of the blood entering the pulmonary capillaries?
The PCO2 of the blood is higher
What is the result of the partial pressure gradient of carbon dioxide in the alveolus?
Carbon dioxide diffuses out of the blood
Explore the mechanics of pulmonary ventilation, including the exchange of air between the atmosphere and the lungs, and the rules governing pressure changes and gas flow.
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