Question

bio130 exam 3 - chapters 10 and 11 nervous syst... from what nerve plexus does the phrenic nerve arise? multiple choice cervical plexus lumbosacral plexus brachial plexus

Explanation:

The phrenic nerve, which innervates the diaphragm, arises from the cervical plexus. The cervical plexus is formed by the ventral rami of the first four cervical spinal nerves (C1 - C4). The brachial plexus innervates the upper limb, and the lumbosacral plexus innervates the lower limb and pelvic region, so they are not the source of the phrenic nerve.

Answer:

Cervical plexus