Which of the following factors does NOT contribute to defence of the respiratory system
A)coughs and sneezes
B)cilia-propelled mucus escalator
C)alveolar macrophages
D)normal microbial population of the lungs

Question

Quizplus · Accepted Answer

The normal microbial population of the lungs is not directly involved in defense of the respiratory system. It is the other factors listed (coughs and sneezes, cilia-propelled mucus escalator, and alveolar macrophages) that help to protect the respiratory system from pathogens and foreign particles. However, it is important to note that the normal microbial population can indirectly contribute to defense by competing with potentially harmful microbes for resources and space in the respiratory tract.

Which of the Following Factors Does NOT Contribute to Defence