Which of the Following Statements About the Muscles of the Thorax

question 94

Multiple Choice

Which of the following statements about the muscles of the thorax is incorrect?

• A) When the diaphragm contracts, it decreases the volume of the thoracic cavity and expels air from the lungs.
• B) The muscles of the thorax assist in respiration.
• C) The internal and external intercostal muscles have opposite effects on the ribs.
• D) All of the above statements are correct.

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