Spinal Cord/ Spinal Nerve Review Questions

The ________ nerve, which arises in the cervical plexus, innervates the diaphragm. A) sciatic B) lesser occipital C) radial D) ansa cervicalis E) phrenic

E) phrenic

The subdural space lies between A) the pia mater and the dura mater. B) the endosteum and the periosteum. C) the pia mater and the subarachnoid space. D) the arachnoid mater and the pia mater. E) the dura mater and the arachnoid mater.

E) the dura mater and the arachnoid mater

The ________ of each spinal nerve innervates the skin and muscles of the back. A) dorsal ramus B) gray ramus communicantes C) dermatome D) white ramus communicantes E) ventral ramus

A) dorsal ramus

The outermost connective-tissue covering of nerves is the A) epineurium. B) endoneurium. C) perineurium. D) endomysium. E) epimysium.

A) epineurium.

The specialized membranes that surround the spinal cord are termed the A) spinal meninges. B) cranial mater. C) spinal mater. D) cranial meninges. E) epidural membranes.

A) spinal meninges.

The ________ innervates the ventrolateral body surface, structures in the body wall, and the limbs. A) ventral ramus B) gray rami communicantes C) dorsal ramus D) dermatomes E) white rami communicantes

A) ventral ramus

The spinal cord consists of five regions and ________ segments. A) 25 B) 31 C) 5 D) 12 E) number varies widely among individuals

B) 31

In the spinal cord, white matter is separated into ascending and descending tracts organized as A) horns. B) columns. C) ganglia. D) nerves. E) nuclei.

B) columns.

The ventral rami form four major plexuses, including all of the following, except the ________ plexus. A) brachial B) nuchal C) lumbar D) cervical E) sacral

B) nuchal

A dorsal and ventral root of each spinal segment unite to form a A) spinal meninx. B) spinal nerve. C) cervical enlargement. D) lumbar enlargement. E) spinal ganglion.

B) spinal nerve.

Cerebrospinal fluid flows within the A) pia mater. B) subarachnoid space. C) dura mater. D) filum terminale. E) arachnoid mater.

B) subarachnoid space.

Which of the following associations is incorrect? A) 5 sacral spinal nerves B) 8 cervical spinal nerves C) 11 thoracic spinal nerves D) 1 coccygeal spinal nerve E) 5 lumbar spinal nerves

C) 11 thoracic spinal nerves.

The ventral root of a spinal nerve contains A) cell bodies of motor neurons. B) cell bodies of sensory neurons. C) axons of motor neurons. D) interneurons. E) axons of sensory neurons.

C) axons of motor neurons.

The dorsal root ganglia mainly contain A) cell bodies of motor neurons. B) axons of sensory neurons. C) cell bodies of sensory neurons. D) axons of motor neurons. E) synapses.

C) cell bodies of sensory neurons.

The complex, interwoven network formed by contributions from the ventral rami of neighboring spinal nerves is termed a(n) A) tract. B) lateral nerve. C) plexus. D) dermatome. E) autonomic nerve.

C) plexus.

Axons crossing from one side of the spinal cord to the other within the gray matter are found in the A) white commissures. B) posterior gray horns. C) anterior gray horns. D) lateral gray horns. E) gray commissures.

E) gray commissures.

The layer of connective tissue that surrounds individual axons within a peripheral nerve is termed the A) subneurium. B) aponeurium. C) metaneurium. D) endoneurium. E) perineurium.

D) endoneurium

The outward projections from the gray matter of the spinal cord are called A) pyramids. B) fibers. C) tracts. D) horns. E) wings.

D) horns.

Spinal nerves from the sacral region of the cord innervate the ________ muscles. A) abdominal B) intercostal C) facial D) leg E) shoulder

D) leg

The layer of the meninges in direct contact with the spinal cord is the A) dura mater. B) choroid plexus. C) subarachnoid space. D) pia mater. E) arachnoid.

D) pia mater.

Enlargements of the spinal cord occur A) in the thoracic region. B) near the posterior median sulcus. C) adjacent to the anterior median fissure. D) in the sacral region. E) in those spinal segments that control the limbs.

E) in those spinal segments that control the limbs.

In an adult, the conus medullaris is found at about A) L5. B) Co1. C) T6. D) T10. E) L1.

E) L1

Spinal nerves are A) interneuronal. B) involuntary. C) purely motor. D) purely sensory. E) both sensory and motor.

E) both sensory and motor.

In which plexus does the ulnar nerve arise? A) cervical B) sacral C) cranial D) lumbar E) brachial

E) brachial

The ventral rami of spinal nerves C5 to T1 contribute fibers to the ________ plexus. A) cervical B) thoracic C) lumbar D) sacral E) brachial

E) brachial