試題詳解

54. How is lung volume changed during inhalation in mammals?
(A) By decreasing the volume of the thoracic cavity via muscle contraction.
(B) By the movement of the diaphragm and rib muscles, increasing thoracic volume.
(C) By the elastic recoil of the lungs, which expands them directly.
(D) By the contraction of muscles within the lungs themselves, expanding the volume.
(E) By the increase of pressure within the lung, forcing expansion.