Which of the Following Mechanisms Is by Far the Most

question 18

Multiple Choice

Which of the following mechanisms is by far the most significant cause of thoracic cavity enlargement during inspiration?

• A) Downward movement of the diaphragm
• B) Upward movement of the diaphragm
• C) Abdominal muscle contraction
• D) Abdominal muscle relaxation

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Definitions:

Side-to-Side Comparison

A diagnostic approach where the function or structure of one side of the body is compared to the other to identify abnormalities.

Thorax

The part of the body between the neck and the abdomen, encased by the rib cage, and containing the heart and lungs.

Tactile Fremitus

The palpable vibration transmitted through the chest wall when a person speaks, used to assess the presence of lung and respiratory diseases.

Scapulae

The scapulae are the technical term for the shoulder blades, which are large, flat bones on the back side of the ribcage.