The drop in pressure in the alveoli to below atmospheric pressure will
A)draw external air into the lungs.
B)push internal air out of the lungs.
C)have no effect on air movement.

Question

Quizplus · Accepted Answer

When the pressure in the alveoli drops below atmospheric pressure, it creates a pressure gradient and draws external air into the lungs, allowing for inhalation. This is known as negative pressure breathing. Therefore, choice A is the correct answer. B is incorrect because the drop in pressure would not push internal air out of the lungs, and C is incorrect because it does have an effect on air movement.

The Drop in Pressure in the Alveoli to Below Atmospheric