Question

During inspiration, intraoral pressure is ____________________ relative to atmospheric pressure. a) Higher than

b) Lower than
c) Equal to
d) Unrelated to

Answer 1

During inspiration, intraoral pressure is lower than atmospheric pressure, enabling air to flow into the lungs due to the difference in pressure.

Step-by-step explanation:

During inspiration, intraoral pressure is lower than atmospheric pressure. This difference in pressure is what allows air to flow into the lungs. According to Boyle's law, which describes the inverse relationship between the volume and pressure of a gas, when the volume of the space available for air increases (such as when the lungs expand during inspiration), the pressure decreases.

This process generates a negative pressure within the alveoli relative to the outside atmosphere, causing air to enter the lungs to equalize the pressure.