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Questions and Answers
What is the main function of the one-cell-thick wall of the alveolus?
What is the main function of the one-cell-thick wall of the alveolus?
- Act as a barrier to blood flow
- Produce oxygen
- Prevent gas exchange
- Facilitate diffusion of gases (correct)
Why does oxygen diffuse from the air in the alveolus to the blood?
Why does oxygen diffuse from the air in the alveolus to the blood?
- To escape the alveolus
- To reach higher concentration in the blood
- To reach lower concentration in the blood (correct)
- To increase oxygen in the air
How does carbon dioxide move during gas exchange in the alveolus?
How does carbon dioxide move during gas exchange in the alveolus?
- From higher concentration in blood to lower concentration in air (correct)
- Stays within the alveolus
- Converts into oxygen
- From lower concentration in blood to higher concentration in air
Which vessel brings deoxygenated blood to the capillaries in the lungs?
Which vessel brings deoxygenated blood to the capillaries in the lungs?
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Why is it important for the alveolus to be lined with a film of moisture?
Why is it important for the alveolus to be lined with a film of moisture?
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What happens to oxygenated blood after it leaves the capillaries of the alveoli?
What happens to oxygenated blood after it leaves the capillaries of the alveoli?
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What is the role of thin walls in both alveoli and capillaries during gas exchange?
What is the role of thin walls in both alveoli and capillaries during gas exchange?
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