Inspiration and Expiration — Prelims Questions

Which of the following statements accurately describes the events during normal quiet inspiration?

During forced expiration, which of the following muscles actively contract?

If the intrapulmonary pressure is $762\,\text{mmHg}$ and atmospheric pressure is $760\,\text{mmHg}$, what phase of breathing is most likely occurring?

What is the primary reason for the negative intrapleural pressure?

Which of the following sequences correctly describes the events during quiet expiration?

During inspiration, the intrapleural pressure becomes more negative. What is the approximate change in intrapleural pressure from its resting value of $-4\,\text{mmHg}$ during quiet inspiration?