Multiple choice

Which of the following processes leads to the contraction of the diaphragm?

  1. Inspiration

  2. Expiration

  3. Ingestion

  4. Egestion
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A Correct answer
Explanation

The diaphragm is crucial for breathing and respiration. During inspiration, the diaphragm contracts , thus enlarging the thoracic cavity (the external intercostal muscles also participate in this enlargement). 

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