Question

During inspiration, the diaphragm

• A. expands
• B. shows no change
• C. contracts and flattens
• D. relaxes to become dome-shaped

Answer 1

Answer: (C)

Diaphragm is a muscular structure present between abdominal and thoracic cavity in mammals.
In normal condition, diaphragm is dome shaped. During inspiration, it becomes flat due to contraction and during expiration, it becomes relaxed.