Under normal conditions, intrapleural pressure is always less than atmospheric pressure.

Question

Quizplus · Accepted Answer

This is because the pressure in the pleural space is typically negative relative to atmospheric pressure, which helps to pull the lungs outward and create a vacuum that keeps them expanded. This negative pressure is generated by opposing forces between the chest wall and the lungs, as well as the presence of pleural fluid that helps to reduce friction during respiratory movements.

Under Normal Conditions, Intrapleural Pressure Is Always Less Than Atmospheric