Solved UPSC CDS/OTA Question
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Q · Respiratory System medium · 45s
Which surface tension–reducing agent prevents alveolar collapse?
TopicRespiratory System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Pulmonary surfactant, produced by type II pneumocytes, lowers alveolar surface tension, stabilizes alveoli of different sizes, and reduces work of breathing, especially during exhalation.
Final Answer: Option B - Surfactant