Which of These Skeletal Muscles is Innervated by the Phrenic

Question

Which of these skeletal muscles is innervated by the phrenic nerve
A)rectus abdominis
B)diaphragm
C)external intercostal
D)sternocleidomastoid

Accepted Answer

The phrenic nerve innervates the diaphragm, which aids in breathing by contracting and pulling air into the lungs. The other muscles listed (rectus abdominis, external intercostal, and sternocleidomastoid) are all innervated by other nerves and have different functions.