Question

In normal expiration the diaphragm is-
(A) Arched
(B) Flattened
(C) Not involved
(D) Perforated

Answer 1

the diaphragm is arched

Answer 2

Dear Student,

◆ Answer - (A)

In normal expiration the diaphragm is arched.

● Explanation -

• Normally, inspiration is active process while expiration is a passive process.
• During inspiration, diaphragm is contracted to expand thoracic cavity.
• Enlarged diaphragm appears flattened during inspiration.
• During expiration previously contracted diaphragm gets relaxed to reduce volume of thoracic cavity.
• Relaxed diaphragm appears arched up during inspiration.

Thanks dear. Hope this helps you ..