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ACSM Personal Trainer

Category - Exercise Programming and Implementation

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In order to expand the volume of the thoracic cavity during inhalation, what must occur?

The diaphragm moves upward
The ribs compress
Inspiratory muscles relax
Inspiratory muscles contract

Explanation

Answer: D - In order to expand the volume of the thoracic cavity during inhalation, the inspiratory muscles contract. When this happens, the diaphragm moves downward toward the abdomen and the rib cage is pulled up and outward.

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