Which muscle is the main muscle of quiet inspiration?
Correct answer: A. Diaphragm
- A. Diaphragm
- B. Internal intercostal muscle
- C. Abdominal muscle
- D. Sternocleidomastoid muscle
Explanation
The diaphragm is the primary muscle used during quiet inspiration. The accessory muscles, including the sternocleidomastoid, are recruited when breathing becomes laboured or deeper inspiration is required.
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About Respiratory System
The respiratory system includes the air passages, lungs, pleura, alveoli and the mechanics of breathing. It explains pulmonary ventilation, gas exchange, oxygen and carbon dioxide transport, regulation of breathing, and the difference between external respiration in the lungs and internal respiration in body tissues.
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