Which of the following conditions is necessary for air to enter the lungs during inspiration?
A)The alveolar pressure must be lower than the atmospheric pressure.
B)The alveolar pressure must be higher than the atmospheric pressure.
C)The alveolar pressure must be equal to the atmospheric pressure.
D)The size of the lungs must be decreased.
E)The diaphragm has to be relaxed.

Question

Quizplus · Accepted Answer

For air to enter the lungs during inspiration, the pressure inside the alveoli must be lower than the atmospheric pressure. This pressure gradient allows air to flow into the lungs.

Which of the Following Conditions Is Necessary for Air to Enter