Which of the following is an innate (non-specific)defence mechanism of the respiratory system?

Question

Quizplus · Accepted Answer

All of the listed mechanisms, nasal hairs, alveolar macrophages, the ciliated epithelium, and the cough reflex, are innate (non-specific) defense mechanisms of the respiratory system. Nasal hairs filter out larger particles, alveolar macrophages engulf and destroy harmful agents, the ciliated epithelium moves mucus and trapped particles upward towards the throat to be cleared, and the cough reflex forcefully expels irritants and pathogens from the respiratory tract.

Which of the Following Is an Innate (Non-Specific)defence Mechanism of the Respiratory