Which of the following muscles might be recruited to increase inspired volume?
A)sternocleidomastoid
B)pectoralis minor
C)scalenes
D)serratus anterior
E)All of the answers are correct.

Question

Quizplus · Accepted Answer

All of the listed muscles can be recruited to increase inspired volume. The sternocleidomastoid elevates the sternum and clavicle, allowing for increased air intake. The pectoralis minor pulls the ribs up and out, increasing thoracic volume. The scalenes elevate the first two ribs during deep breaths. The serratus anterior helps to expand the ribcage and can aid in deep breathing.

Which of the Following Muscles Might Be Recruited to Increase