Question

The contraction of internal intercoastal muscles in man causes?

• A. Normal expiration
• B. inspiration
• C. Forced expiration
• D. normal respiration

Answer 1

The correct option is A Normal expiration

A. normal expiration

EXPLANATION: Intercostal muscles are several groups of muscles, which are present between ribs and help to form and move the chest wall. These muscles are involved in mechanical aspects of breathing. The contraction of Intercostal muscles or internal intercontinental muscles in man causes expiration. Expiration or exhalation is the flow of the breath out of an organism.