During inspiration, contraction of the diaphragm causes the volume of Mr. Jones' thoracic cavity to increase and the pleural pressure to decrease. The pressure in his alveoli (Palv) will
A. does not change.
B. become greater than atmospheric pressure (PB), causing air to move out of his lungs.
C. decrease below atmospheric pressure (PB), causing air to move out of his lungs.
D. become greater than atmospheric pressure (PB), causing air to move into his lungs.
E. decrease below atmospheric pressure (PB), causing air to move into his lungs.
Answer: E
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