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Question
Which of the following best describes the process of gas exchange in the lungs?
Options
Air moves in and out of the alveoli during breathing.
Carbon dioxide diffuses from deoxygenated blood in capillaries into the alveolar air.
Oxygen and carbon dioxide diffuse down their concentration gradients between blood and alveolar air.
Oxygen diffuses from alveolar air into deoxygenated blood.
Solution
Oxygen and carbon dioxide diffuse down their concentration gradients between blood and alveolar air.
RELATED QUESTIONS
Which of the following substances in tobacco smoke damage the gas exchange system?
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Compared to O2, diffusion rate of CO2 through the diffusion membrane per unit difference in partial pressure is much higher. Explain.
