Multiple Choice Questions and Answers on Respiratory System Related

Review Multiple Choice Questions and Answers on Respiratory System related questions and content

Which of the following structures is not part of the bronchial tree?

  • A. alveoli
  • B. bronchi
  • C. terminal bronchioles
  • D. respiratory bronchioles
Correct Answer: A

Rationale: The correct answer is A: alveoli. The alveoli are not part of the bronchial tree; they are the tiny air sacs at the end of the bronchial tree where gas exchange occurs. The bronchial tree consists of the bronchi, terminal bronchioles, and respiratory bronchioles, which are responsible for conducting air into the lungs. Alveoli are located at the end of the respiratory bronchioles and are where oxygen is absorbed into the bloodstream and carbon dioxide is released. Therefore, alveoli are not considered part of the bronchial tree.