The function of surfactant in the lungs is to:

A Transport oxygen

B Reduce surface tension in alveoli to prevent collapse

C Filter air

D Warm incoming air

✓ Correct Answer: Option B

Pulmonary surfactant (phospholipid mixture) reduces surface tension, preventing alveolar collapse during expiration.

💡 Why is B) the correct answer?

The correct answer to the question "The function of surfactant in the lungs is to:" is Option B: Reduce surface tension in alveoli to prevent collapse.

The other options — A) Transport oxygen, C) Filter air, D) Warm incoming air — are incorrect for this PCAT Exam Prep question. As explained above: Pulmonary surfactant (phospholipid mixture) reduces surface tension, preventing alveolar collapse during expiration.

📚 About This PCAT Exam Prep Practice Question

This 2-level PCAT Exam Prep question from the Biological Processes topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free PCAT Exam Prep practice test or use flashcards for spaced repetition review.

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The function of surfactant in the lungs is to:

✓ Correct Answer: Option B

📚 About This PCAT Exam Prep Practice Question

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