Which of the following does not contribute to defense of the respiratory system?

Name: Which of the following does not contribute to defense of the respiratory system?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The normal microbial population of the lungs is not a direct contributor to the defense of the respiratory system. However, it can indirectly contribute by competing with potentially harmful microorganisms for resources and limiting their growth. The other options listed are all important defense mechanisms of the respiratory system.

Which of the Following Does Not Contribute to Defense of the Respiratory