Which of the following muscles contracts during forced expiration?

Question

Quizplus · Accepted Answer

During forced expiration, the internal intercostal muscles contract to decrease the volume of the thoracic cavity and increase the pressure to push air out of the lungs. The scalenes are involved in inspiration, not expiration. The diaphragm is involved in both inspiration and expiration but is not specifically contracted during forced expiration. The linea alba is a connective tissue structure that runs down the midline of the abdominal wall and is not involved in respiration. The external intercostals are involved in inspiration, not expiration.

Which of the Following Muscles Contracts During Forced Expiration