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Aeromedical factorsQuestion 721 of 934

What does hyperventilation do to the body?

  1. It removes too much oxygen from the blood
  2. It removes too much carbon dioxide from blood
  3. It adds too much carbon dioxide to the blood
  4. It stops the heart from pumping blood to the brain
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Correct answer: It removes too much carbon dioxide from blood

Hyperventilation is an excessive rate and depth of breathing that causes abnormal loss of carbon dioxide.

Source: Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Chapter 17: Aeromedical Factors — Hyperventilation, page 426

Practice aeromedical factors

Questions last reviewed: 18 October 2026