HESI A2 Practice Test & Study Guide

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Human Body Systems HESI A2 Practice Questions

Free Human Body Systems practice questions for the HESI A2 exam with detailed rationales.

Question 2 of 2

What is the primary role of the alveoli in the respiratory system?

To regulate airflow through the bronchioles

To produce mucus that traps pathogens

To facilitate gas exchange between air and blood

To filter air entering the lungs

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