Respiratory System Anatomy and Physiology Quiz
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Questions and Answers

What is the significance of pulmonary surfactant in breathing?

  • It decreases lung compliance
  • It increases lung elasticity
  • It increases the partial pressure of oxygen in the blood
  • It decreases surface tension in the alveoli (correct)

    • How are inspiration and expiration accomplished?

  • By the contraction of the diaphragm and intercostal muscles during inspiration, and their relaxation during expiration (correct)
  • By the relaxation of the abdominal muscles during inspiration, and their contraction during expiration
  • By the contraction of the abdominal muscles during inspiration, and their relaxation during expiration
  • By the relaxation of the diaphragm and intercostal muscles during inspiration, and their contraction during expiration

    • What are the factors that influence the partial pressure of blood gases and the total content of gases in the blood?

  • Ventilation and perfusion (correct)
  • Altitude and atmospheric pressure
  • Blood pressure and heart rate
  • Temperature and humidity

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