Forceful expiration involves the contraction of
A)neck and chest muscles.
B)internal intercostals and chest muscles.
C)internal intercostals and abdominal muscles.
D)neck and abdominal muscles.

Question

Quizplus · Accepted Answer

Forceful expiration is the process of forcefully exhaling air out of the lungs. This is achieved through the contraction of both the internal intercostal muscles and the abdominal muscles. The internal intercostal muscles are located between the ribs and are responsible for pulling the ribs downward, reducing the volume of the thoracic cavity and increasing the pressure within it. The abdominal muscles help to compress the abdominal organs and push the diaphragm upward, further reducing the volume of the thoracic cavity and increasing the pressure within it. The contraction of neck and chest muscles would not directly contribute to forceful expiration.

Forceful Expiration Involves the Contraction of