Question

multiple choice question
at the end of an expiration (pause between breathes), the pressure inside the airways is ______ the atmospheric pressure.
o less than
o greater than
o equal to

Explanation:

During expiration, air is forced out of the lungs until the pressure inside the airways (intrapulmonary pressure) matches the atmospheric pressure. At the pause between breaths (end - expiration), there is no net movement of air, which occurs when pressures are equal.

Answer:

equal to