📝 Multiple Choice Question
General-science
What is the primary role of 'Surfactant' in the human lungs
A
To increase the surface area of alveoli
B
To reduce surface tension and prevent alveolar collapse
C
To transport oxygen into the capillaries
D
To trap dust and bacteria
Explanation
Pulmonary surfactant reduces the work of breathing by preventing small alveoli from collapsing.
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