Solved UPSC CDS/OTA Question
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Q · Respiratory System medium · 45s
Which tissue lines the trachea and bronchi, trapping particles and moving them out of the airway?
TopicRespiratory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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The respiratory epithelium is pseudostratified ciliated columnar cells with goblet cells. Cilia beat rhythmically to transport mucus-trapped particulates upward toward the pharynx for expulsion, forming the mucociliary escalator defense mechanism.
Final Answer: Option B - Pseudostratified ciliated columnar epithelium