Chapter 16 Spinal Cord and Spinal Nerves: End of Chapter Multiple Choice

Identify the meningeal layer immediately deep to the subdural space a. pia mater b. arachonid mater c. epidural space d. dura mater

b) arachnoid mater

Axons cross from one side of the spinal cord to the other through a region called the a. lateral horn b. posterior horn c. gray commissure d. anterior horn

c) gray commissure

The white matter of the spinal cord is composed primarily of a. unmyelinated axons b. neurolemmocytes and sattelite cells c. myelinated axons d. cell bodies of neurons

c) myelinated axons

Which structure provides motor innervation to the deep back muscles and receives sensory information from the skin of the back? a. anterior ramus b. anterior root c. posterior ramus d. posterior root

c) posterior ramus

Which statement is true about intercostal nerves? a. They are formed from the posterior rami of spinal nerves b. They form a thoracic plexus of nerves c. They originate from the thoracic part of the spinal cord d. They innervate the deep back muscles of the thoracic region

c) they originate from the thoracic part of the spinal cord

The radial nerve originates from the ______ plexus. a. Cervical b. Lumbar c. Sacral d. Brachial

d) Brachial

The anterior root of a spinal nerve contains a. axons of both motor and sensory neurons b. axons of sensory neurons only c. interneurons d. axons of motor neurons only

d) axons of motor neurons only

The tapered inferior end of the spinal cord is called the a. conus medullaris b. filum terminale c. cauda equina d. posterior root

a) conus medullaris

Lower limbs are supplied by neurons from the _______ of the spinal cord. a. lumbosacral enlargement b. thoracic region c. cervical enlargement d. All of these are correct

a) lumbrosacral enlargement

The subarachnoid space contains ________, and the epidural space contains _________. a. CSF; fat, connective tissue, and blood vessels b. fat, connective tissue, and blood vessels; blood c. CSF; pia mater d. fat, connective tissue, and blood vessels; CSF

a)CSF; fat, connective tissue, and blood vessels