Question

The contraction of internal intercostal muscles in man causes

• A. inspiration
• B. forced expiration
• C. normal expiration
• D. normal respiration

Answer 1

The correct option is C normal expiration

Normal expiration

Expiration is a process that results in the removal of air from the lungs.

As the internal intercostal muscles contract and result in the movement of the ribs in the inner side, it results in the relaxation of the lungs and expelling the air out of the lungs.

Thus, the contraction of internal intercostal muscles results in normal expiration.

Final answer

(1) normal expiration