Which of the following correctly describes the process of inspiration (air entering the lungs)?
A)The lungs expand,causing their internal pressure to decrease.
B)The lungs expand,causing their internal pressure to increase.
C)The lungs contract,causing their internal pressure to decrease.
D)The lungs contract,causing their internal pressure to increase.
E)There is no change in the internal pressure in the lungs.

Question

Quizplus · Accepted Answer

During inspiration, the diaphragm and external intercostal muscles contract, causing the chest cavity to expand. This increase in volume leads to a decrease in pressure within the lungs, causing air to flow in from the environment. So, the lungs expand, causing their internal pressure to decrease.

Which of the Following Correctly Describes the Process of Inspiration