Which of the following occurs with the exhalation of air from human lungs?
A)The volume of the thoracic cavity decreases.
B)The residual volume of the lungs decreases.
C)The diaphragm contracts.
D)The epiglottis closes.
E)The rib cage expands.

Question

Quizplus · Accepted Answer

During exhalation, the volume of the thoracic cavity decreases as the diaphragm relaxes and moves upwards, causing the lungs to recoil and expel air out. The rib cage also moves downwards and inwards during exhalation. The residual volume of the lungs, which is the air that remains in the lungs after maximal exhalation, actually increases during exhalation as some air is trapped in the alveoli. The epiglottis is not directly involved in the process of breathing.

Which of the Following Occurs with the Exhalation of Air