Respiratory System Anatomy: Trachea, Bronchi, and Larynx
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Questions and Answers

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?

  • 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?

  • 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?

    <p>Artery to the lungs</p> Signup and view all the answers

    Why is it important for the alveolus to be lined with a film of moisture?

    <p>To enhance diffusion of gases</p> Signup and view all the answers

    What happens to oxygenated blood after it leaves the capillaries of the alveoli?

    <p>Taken to the heart via veins from the lungs</p> Signup and view all the answers

    What is the role of thin walls in both alveoli and capillaries during gas exchange?

    <p>To facilitate diffusion of gases</p> Signup and view all the answers

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