What is the main function of the alveoli in the human respiratory system?

A Filtering foreign particles from inhaled air

B Warming and moistening inhaled air before it reaches the lungs

C Exchanging oxygen and carbon dioxide between air and blood

D Producing vocal sounds through vibration

✓ Correct Answer: Option C

Alveoli are tiny air sacs in the lungs where the crucial process of gas exchange takes place. Oxygen diffuses from the inhaled air into the bloodstream, while carbon dioxide diffuses from the blood into the alveoli to be exhaled.

💡 Why is C) the correct answer?

The correct answer to the question "What is the main function of the alveoli in the human respiratory system?" is Option C: Exchanging oxygen and carbon dioxide between air and blood.

The other options — A) Filtering foreign particles from inhaled air, B) Warming and moistening inhaled air before it reaches the lungs, D) Producing vocal sounds through vibration — are incorrect for this GED Exam Prep question. As explained above: Alveoli are tiny air sacs in the lungs where the crucial process of gas exchange takes place. Oxygen diffuses from the inhaled air into the bloodstream, while carbon dioxide diffuses from the blood i…

📚 About This GED Exam Prep Practice Question

This 2-level GED Exam Prep question from the Science 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 GED Exam Prep practice test or use flashcards for spaced repetition review.

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What is the main function of the alveoli in the human respiratory system?

✓ Correct Answer: Option C

📚 About This GED Exam Prep Practice Question

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