Question

multiple choice question
during exhalation, muscles of respiration

increase the space of the thoracic cavity
decrease the space of the thoracic cavity

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Explanation:

During exhalation, the respiratory muscles relax. This relaxation causes the thoracic cavity to decrease in volume. As the volume of the thoracic cavity decreases, air is pushed out of the lungs.

Answer:

decrease the space of the thoracic cavity