spinal cord and spinal nerves multiple choice

The axillary nerve is a major nerve of the ________ plexus.

Brachial

Which spinal nerve roots form the brachial plexus? a. C1-C4 b. C5-C8 c. T1-T12 d. L1-L5

C5-C8

All of the following are true about gray and white matter in the spinal cord, except:

Gray matter passes information up and down the spinal cord

What function does gray matter serve in spinal reflexes?

It acts as a processing center for the reflex signal

The innermost layer of the meninges of the spinal cord is the:

Pia mater

The major nerve that passes from the level of the sacrum down the posterior leg is the ________ nerve.

Sciatic

Why can spinal reflexes occur more quickly than premeditated actions?

The signal for a spinal reflex is processed in the spinal cord rather than the cerebrum

Each dermatome sends sensory signals through

a single pair of spinal nerves

All of the following are true about gray and white matter in the spinal cord

b. Regions called horns contain gray matter c. White matter is arranged in columns d. Tracts consist of white matter

Dorsal roots carry ________ signals ________ the spinal cord, while ventral roots carry ________ signals ________ the spinal cord.

c. Sensory, into; motor, out of

Which plexus innervates muscles of the neck?

cervical