How Much Do You Know about Diffusing Capacity for Oxygen During Exercise?
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Questions and Answers

During strenuous exercise or other conditions that increase the pulmonary blood flow and alveolar ventilation, what happens to the diffusing capacity for O2?

  • It stays the same
  • It increases (correct)
  • It fluctuates
  • It decreases

    • What causes the increase in diffusing capacity for O2 during strenuous exercise or other conditions that increase the pulmonary blood flow and alveolar ventilation?

  • A decrease in alveolar ventilation
  • Opening up dormant pulmonary capillaries (correct)
  • A decrease in surface area
  • A decrease in pulmonary blood flow

    • What is the purpose of increasing the diffusing capacity for O2 during strenuous exercise or other conditions that increase the pulmonary blood flow and alveolar ventilation?

  • To decrease the surface area of the blood into which O2 can diffuse
  • To decrease the amount of O2 that can diffuse
  • To increase the surface area of the blood into which O2 can diffuse (correct)
  • To decrease the pulmonary blood flow

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