Question 1

The ________ is a strand of fibrous tissue that provides longitudinal support as a component of the coccygeal ligament.

Accepted Answer

A) conus medullaris 
B) filum terminale 
C) cauda equina 
D) dorsal root 
E) ventral root

Question 2

In which plexus does the ulnar nerve arise?

Accepted Answer

A) cranial 
B) cervical 
C) brachial 
D) lumbar 
E) sacral

Question 3

All of the following are true of muscle spindles,except that they

Accepted Answer

A) are found within skeletal muscle. 
B) consist of specialized fibers called intrafusal fibers. 
C) are found in tendons. 
D) are the receptor for the stretch reflex. 
E) are innervated by gamma motor neurons.

Question 4

Figure 13-2 Spinal Nerves
Use Figure 13-2 to answer the following questions:
-Identify the structure labeled "5."

Accepted Answer

A) autonomic nerve 
B) autonomic ganglion 
C) rami communicantes 
D) dorsal root ganglion 
E) ventral root

Question 5

Tina falls while climbing a tree and lands on her back.Her frightened parents take her to the emergency room,where she is examined.Her knee-jerk reflex is normal and she exhibits a plantar reflex (negative Babinski reflex).These results suggest that

Accepted Answer

A) Tina has injured one of her descending nerve tracts. 
B) Tina has injured one of her ascending nerve tracts. 
C) Tina has a spinal injury in the lumbar region. 
D) Tina has a spinal injury in the cervical region. 
E) Tina suffered no damage to her spinal cord.

Question 6

In the spinal cord,white matter is separated into ascending and descending tracts organized as

Accepted Answer

A) nuclei. 
B) ganglia. 
C) columns. 
D) nerves. 
E) horns.

Question 7

Which of the following is not true about a positive Babinski reflex?

Accepted Answer

A) normal in newborns 
B) abnormal in adults 
C) a sign of injury to descending spinal tracts 
D) why you close your eyes when you sneeze 
E) flaring of the toes when the sole is stroked

Question 8

In the condition ________,a virus infects dorsal root ganglia,causing a painful rash whose distribution corresponds to that of the affected sensory nerves as seen in their dermatomes.

Accepted Answer

A) myasthenia gravis 
B) neuronal damage 
C) shingles 
D) chickenpox 
E) Hodgkin's disease

Question 9

Figure 13-2 Spinal Nerves
Use Figure 13-2 to answer the following questions:
-Identify the structure labeled "3."

Accepted Answer

A) spinal nerve 
B) gray ramus 
C) white ramus 
D) dorsal ramus 
E) ventral ramus

Question 10

In an adult,the conus medullaris is found at about

Accepted Answer

A) T₆. 
B) T₁₀. 
C) L₁. 
D) L₅. 
E) C₁.

Question 11

The ________ reflex complements the flexor reflex by activating contralateral muscles.

Accepted Answer

A) stretch 
B) tendon 
C) flexor 
D) crossed extensor 
E) reciprocal

Question 12

What is a reflex arc? What components must be present to qualify?

Accepted Answer

The answer of What is a reflex arc? What components...

Question 13

The dorsal root ganglia mainly contain

Accepted Answer

A) axons of motor neurons. 
B) axons of sensory neurons. 
C) cell bodies of motor neurons. 
D) cell bodies of sensory neurons. 
E) synapses.

Question 14

Figure 13-2 Spinal Nerves
Use Figure 13-2 to answer the following questions:
-Which branch carries motor neurons to structures on the back of the body trunk?

Accepted Answer

A) 1 
B) 2 
C) 5 
D) 7 
E) 11

Question 15

While playing football,Ramón is tackled hard,and as he tries to get up,he finds that he has difficulty flexing and adducting his left thigh and extending his left leg.Which nerve innervating the lower limb may be damaged,and how would the damage affect sensory perception in Ramón's left leg?

Accepted Answer

The answer of While playing football,Ramón is tackled hard,and as...

Question 16

During the procedure known as a(n)________,a needle is inserted into the subarachnoid space in the inferior lumbar region.

Accepted Answer

The answer of During the procedure known as a(n)________,a needle...

Question 17

Samples of CSF for diagnostic purposes are normally obtained by placing the tip of a needle in the

Accepted Answer

A) dura mater. 
B) arachnoid mater. 
C) epidural space. 
D) subarachnoid space. 
E) cerebral ventricles.

Question 18

The white matter of the spinal cord contains

Accepted Answer

A) bundles of axons with common origins,destinations,and functions. 
B) bundles of dendrites with common origins,destinations,and functions. 
C) sensory and motor nuclei. 
D) both axons and dendrites. 
E) interneurons.

Question 19

The postganglionic fibers that connect an autonomic ganglion in the thoracic or lumbar region with the spinal nerve and contain postganglionic fibers that innervate glands in the body wall or limbs are

Accepted Answer

A) white rami communicantes. 
B) gray rami communicantes. 
C) dorsal ramus. 
D) ventral ramus. 
E) dermatomes.

Question 20

The ________ innervates the ventrolateral body surface,structures in the body wall,and the limbs.

Accepted Answer

A) white rami communicantes 
B) gray rami communicantes 
C) dorsal ramus 
D) ventral ramus 
E) dermatomes

Exam 13: The Spinal Cord, spinal Nerves, and Spinal Reflexes