Final answer:
The equilibration of pressure between the intrapleural space and the alveoli leads to the equalization of intra-alveolar pressure with atmospheric pressure.
Step-by-step explanation:
The equilibration of pressure between the intrapleural space and the alveoli leads to the equalization of intra-alveolar pressure with atmospheric pressure. This is important for the process of breathing. The intrapleural pressure is always lower than the intra-alveolar pressure, creating a negative pressure that helps keep the lungs expanded.