Questions and Answers on Respiratory System Related

Review Questions and Answers on Respiratory System related questions and content

A nurse caring for a client removes the client's oxygen as prescribed. The client is now breathing what percentage of oxygen in the room air?

  • A. 14%
  • B. 21%
  • C. 28%
  • D. 31%
Correct Answer: B

Rationale: The correct answer is B (21%). Room air contains approximately 21% oxygen. By removing the supplemental oxygen, the client is now breathing the oxygen content present in the surrounding air. Choices A, C, and D are incorrect as they do not reflect the standard oxygen concentration in room air. Oxygen concentration in room air is typically around 21%, making choice B the most accurate option.