During Expiration, Why Does Gas Flow Out from the Lungs

question 50

Multiple Choice

During expiration, why does gas flow out from the lungs to the atmosphere?

• A) P_alv is less than at the airway opening.
• B) P_alv is the same as at the airway opening.
• C) P_alv is greater than at the airway opening.
• D) Airway pressure is greater than P_alv.

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