Why is the actual flow of air into the alveoli during inspiration passive?

A. because the intercostal muscles are involved
B. because there is a continuous column of air from the pharynx to the alveoli
C. because the diaphragm is involved
D. because the lungs are surrounded by the thoracic wall
E. because the alveoli have a very large surface area


Answer: B

Biology & Microbiology

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