How is the air supply described in the material?

• A. Taken into the lungs by inspiratory muscles, especially the diaphragm, and expelled by expiratory muscles
• B. Filtered through the nasal cavity
• C. Generated by the larynx
• D. Controlled by the tongue

Answer: (A)

Air supply is described in terms of breathing mechanics. Inhalation is driven by inspiratory muscles, especially the diaphragm, which contracts to pull air into the lungs by expanding the chest cavity. Exhalation occurs as the expiratory muscles help push air out, with the lungs’ elastic recoil assisting when those muscles relax. This muscle-driven cycle is how the air enters and leaves the lungs, and it underpins steady breath support in activities like singing or speaking. While other parts of the system—such as the nasal passages filtering air or the larynx and tongue shaping sound—play important roles, the basic description of the air supply focuses on how the diaphragm and other breathing muscles control inhalation and exhalation.