Practice Quiz

NREMT Paramedic Certification Exam

Category - Paramedic

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When the thoracic cavity increases in size, a vacuum is created that forms negative pressure. Which of the following statements is true about the gas exchange that has occurred?
  1. Oxygen levels decrease while carbon dioxide also decreases.
  2. Carbon dioxide levels increases while oxygen decreases.
  3. Oxygen levels increase as carbon dioxide decreases.
  4. Carbon dioxide levels increase while oxygen also increases.
Explanation
Answer - C - When the thoracic cavity increases in size, air is drawn into the lungs. This will increase the oxygen levels and decrease the carbon dioxide levels.
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