Which of the following is TRUE when the lung volume is equal to the functional residual capacity?
A) Intra-alveolar pressure is less than intrapleural pressure.
B) Intra-alveolar pressure is greater than atmospheric pressure.
C) The elastic recoil of the lungs is balanced by the elastic recoil of the chest wall.
D) Intrapleural pressure is zero.
E) Intra-alveolar pressure is less than atmospheric pressure.
Ans: C) The elastic recoil of the lungs is balanced by the elastic recoil of the chest wall.
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