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Inspiration is normally brought about by...

Inspiration is normally brought about by the relaxation of inspiratory muscles.

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**Step-by-Step Solution:** 1. **Understanding Inspiration**: Inspiration is the process of taking air into the lungs. It involves the movement of air from the atmosphere into the respiratory tract, which includes the nose, trachea, and lungs. 2. **Role of Inspiratory Muscles**: The primary muscles involved in the process of inspiration are the diaphragm and the external intercostal muscles. These muscles play a crucial role in expanding the thoracic cavity. 3. **Mechanism of Inspiration**: - **Diaphragm Movement**: During inspiration, the diaphragm contracts and moves downward. This contraction increases the volume of the thoracic cavity. ...
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