Why Is the Actual Flow of Air into the Alveoli

question 26

Multiple Choice

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

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

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