Which muscles are used for forced expiration?
A) Sternocleidomastoid and abdominal muscles
B) Sternocleidomastoid and intercostals
C) External intercostals and pectoralis muscles
D) Abdominal muscles and internal intercostals

Question

Quizplus · Accepted Answer

Forced expiration involves the contraction of the internal intercostal muscles and abdominal muscles, which helps in pushing the diaphragm upward and decreasing the volume of the thoracic cavity, increasing pressure and pushing out air. The sternocleidomastoid muscles and external intercostal muscles are used during normal inspiration, not during forced expiration.

Which Muscles Are Used for Forced Expiration