What happens when the intra-pulmonary pressure is equal to atmospheric pressure?

Step-by-step solution

When the intra-pulmonary pressure is equal to atmospheric pressure, neither inspiration nor expiration occurs . Breathing involves two stages : inspiration during which atmospheric air is drawn in and expiration by which the alveolar air is released out.The movement of air into and out of the lungs is carried out by creating a pressure gradient between the lungs and the atmosphere. Inspiration can occur if the pressure within the lungs (intra-pulmonary pressure) is less than the atmospheric pressure, i.e., there is