Question

Which of the following is the correct sequence of events for an inhalation?

O Thorax volume increases → Pip increases → Prs increases → Palv increases
Thorax volume increases → Palv decreases → Pip decreases → Prs increases
Thorax volume increases → Pip decreases → Palv decreases → Prs decreases
Thorax volume increases → Pip decreases → Prs increases → Palv decreases

Answer 1

The correct sequence of events for inhalation is: Thorax volume increases, Palv decreases, Pip decreases, Prs increases.

Step-by-step explanation:

The correct sequence of events for an inhalation is:

1. Thorax volume increases: During inhalation, the diaphragm contracts and the rib cage expands, causing an increase in the volume of the thoracic cavity.
2. Palv decreases: As the thorax volume increases, the pressure inside the lungs (Palv) decreases.
3. Pip decreases: As Palv decreases, the pressure in the pleural cavity (Pip) also decreases.
4. Prs increases: The decrease in Pip causes an increase in the transpulmonary pressure (Prs), which helps to keep the lungs inflated.

Learn more about Breathing mechanism