Which is normally TRUE about the intrapleural pressure?

Question

Quizplus · Accepted Answer

During normal breathing, intrapleural pressure is always negative and lower than alveolar pressure. This negative pressure helps to keep the airways and alveoli open. Option B is incorrect as intrapleural pressure at functional residual capacity is between -5 and -10 mmHg below atmospheric pressure. Option C is incorrect as intrapleural pressure doesn't alternate during normal breathing. Option D is incorrect as intrapleural pressure decreases to a value lower than atmospheric pressure during a passive exhale. Option E is incorrect as intrapleural pressure is not always the same as atmospheric pressure during a passive exhale.

Which Is Normally TRUE About the Intrapleural Pressure