During exhalation, which action occurs?

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Prepare for the CIEMT Emergency Medical Technician Test. Study using tailored flashcards and multiple choice questions, each offering hints and explanations. Get exam-ready!

Multiple Choice

During exhalation, which action occurs?

Explanation:
During exhalation, air leaves the lungs mainly because the diaphragm relaxes and moves upward, allowing the chest to recoil and the lungs to compress. This relaxation reduces the thoracic volume and increases intrapulmonary pressure, pushing air out. The other options describe actions that would expand the chest or reduce lung pressure, which would promote inhalation or are not the normal passive exhalation mechanism.

During exhalation, air leaves the lungs mainly because the diaphragm relaxes and moves upward, allowing the chest to recoil and the lungs to compress. This relaxation reduces the thoracic volume and increases intrapulmonary pressure, pushing air out. The other options describe actions that would expand the chest or reduce lung pressure, which would promote inhalation or are not the normal passive exhalation mechanism.

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