Question 1

Which of the following best differentiates between the endoneurium and myelin?

Accepted Answer

A)   Endoneurium is more complex because it is composed of connective tissue; whereas myelin is composed of individual cells.
B)   Myelin is more complex as it is composed of multiple cells surrounding a neuron; whereas the endoneurium is simply connective tissue.
C)   Myelin and endoneurium are essentially the same thing, a connective tissue covering surrounding axons of neurons.
D)   Myelin is composed of epithelial tissue, while endoneurium is composed of connective tissue.E) A) and B)
F) None of the above

Question 2

If you pinch your index finger in a door, pain sensations are carried via the ________ nerve.

Accepted Answer

A)   radial
B)   median
C)   axillary
D)   musculocutaneous
E)   ulnarF) B) and E)
G) A) and D)

Question 3

-The figure illustrates a cross section of the spinal cord. Which structure is indicated by "D"?

Accepted Answer

A)   Central canal
B)   Ventral root
C)   Dorsal root ganglion
D)   Spinal nerve
E)   Dorsal rootF) None of the above
G) A) and B)

Question 4

In the patellar tendon reflex arc, the patellar ligament is stretched, which stretches the quadriceps femoris muscle of the thigh. This reflex will cause the quadriceps femoris to ________ and the hamstrings to ________.

Accepted Answer

A)   contract; relax
B)   contract; contract
C)   relax; contract
D)   relax; relaxE) A) and B)
F) A) and C)

Question 5

Which of the following statements concerning structures of the spinal cord is false?

Accepted Answer

A)   The dorsal root of the spinal cord conveys sensory (afferent)  nerve impulses to the spinal cord.
B)   The posterior horn of the cord contains the cell bodies of motor neurons.
C)   The ventral root is formed by the axons of neurons in the lateral and anterior horns.
D)   The dorsal and ventral roots unite to form spinal nerves.
E)   The ventral root of the spinal cord conveys motor (efferent)  nerve impulses away from the spinal cord.F) All of the above
G) D) and E)

Question 6

When a person sits on a hard surface for a period of time, his foot or leg may "go to sleep." This sensation is the result of compressing the ________ nerve.

Accepted Answer

A)   femoral
B)   sciatic
C)   obturator
D)   pudendal
E)   ulnarF) A) and D)
G) A) and E)

Question 7

During a spinal tap, cerebrospinal fluid is obtained from which of the following locations?

Accepted Answer

A)   Dural sinus
B)   Epidural space
C)   Subarachnoid space
D)   Subdural space
E)   Sagittal sinusF) A) and D)
G) A) and C)

Question 8

Spinal nerves C5-T1 make up the ________ plexus.

Accepted Answer

A)   sacral
B)   lumbar
C)   brachial
D)   cervical
E)   radialF) A) and D)
G) B) and C)

Question 9

Cutaneous sensory distribution of a spinal nerve can be mapped as a ________.

Accepted Answer

The answer of Cutaneous sensory distribution of a spinal nerve...

Question 10

Which of the following would explain the loss of certain sensations from the skin of the posterior region of the upper limb?

Accepted Answer

A)   One or more ventral roots in the cervical region of the spinal cord have been damaged.
B)   One or more dorsal roots in the cervical region of the spinal cord have been damaged.
C)   One or more ventral roots in the thoracic region of the spinal cord have been damaged.
D)   One or more dorsal roots in the thoracic region of the spinal cord have been damaged.E) C) and D)
F) B) and D)

Question 11

Which of the following statements concerning the structure of spinal nerves is true?

Accepted Answer

A)   The ventral root contains motor or efferent fibers.
B)   The ventral root has a prominent root ganglion.
C)   Rootlets from the surface of the spinal cord form the dorsal and ventral rami.
D)   Each spinal nerve is formed by the union of a cranial nerve and a spinal nerve.
E)   Spinal nerves do not have specific cutaneous distributions.F) B) and D)
G) None of the above

Question 12

-Label component "A" of the reflex arc.

Accepted Answer

A)   Sensory receptor
B)   Effector organ
C)   Sensory neuron
D)   Motor neuron
E)   InterneuronF) None of the above
G) B) and E)

Question 13

There are ________ cervical spinal nerves.

Accepted Answer

A)   eight
B)   twelve
C)   six
D)   five
E)   fourteenF) A) and B)
G) None of the above

Question 14

-The figure illustrates a cross section of the spinal cord. Which structure is indicated by "E"?

Accepted Answer

A)   Central canal
B)   Ventral root
C)   Dorsal root ganglion
D)   Spinal nerve
E)   Dorsal rootF) B) and C)
G) None of the above

Question 15

Damage to which of these nerves would be most life-threatening?

Accepted Answer

A)   Median nerves
B)   Phrenic nerves
C)   Lumbar nerves
D)   Sciatic nerves
E)   Radial nervesF) All of the above
G) C) and E)

Question 16

Match the action with the specific reflex.
-Partially responsible for a weight lifter suddenly dropping a weight that is too heavy

Accepted Answer

A)   Stretch reflex
B)   Golgi tendon reflex
C)   Withdrawal reflex
D)   Crossed extensor reflex
E)   Reciprocal innervationF) C) and E)
G) A) and B)

Question 17

Because the stretch reflexes can be traced back along certain spinal nerve routes,

Accepted Answer

A)   they are not used in diagnosis of brain potential brain damage.
B)   they are only useful for diagnosis if there has been damage to the spinal cord.
C)   they are helpful when determining at what level of the spinal cord damage may have occurred.
D)   they are only helpful when diagnosing problems in the extremities.
E)   they are only helpful if the patient is conscious.F) None of the above
G) A) and E)

Question 18

-What does "D" represent?

Accepted Answer

A)   Spinal nerves
B)   Conus medullaris
C)   Cervical enlargement
D)   Filium terminale
E)   Cauda equinaF) A) and E)
G) B) and E)

Question 19

Which reflex shows the least synaptic delay?

Accepted Answer

A)   A polysynaptic reflex
B)   The cross extension reflex
C)   The withdrawal reflex
D)   The flexor reflex
E)   The Golgi tendon reflexF) C) and D)
G) B) and E)

Question 20

Which of the following is not a function associated with the spinal cord?

Accepted Answer

A)   Protect neurons in both the ascending and descending tracts
B)   Mediate a reflex, such as the withdrawal of a hand from pain
C)   Conduct sensory information up to the brain
D)   Conduct motor information down the cord
E)   Coordinate the alternating contraction of several muscle groups associated with locomotionF) A) and D)
G) B) and E)

Exam 12: Spinal Cord and Spinal Nerves

There are ________ cervical spinal nerves.

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Which of the following best differentiates between the endoneurium and myelin?

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Cutaneous sensory distribution of a spinal nerve can be mapped as a ________.

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Which reflex shows the least synaptic delay?

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Damage to which of these nerves would be most life-threatening?

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Which of the following is not a function associated with the spinal cord?

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During a spinal tap, cerebrospinal fluid is obtained from which of the following locations?

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-The figure illustrates a cross section of the spinal cord. Which structure is indicated by "D"?

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Which of the following statements concerning structures of the spinal cord is false?

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-What does "D" represent?

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Which of the following statements concerning the structure of spinal nerves is true?

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-Label component "A" of the reflex arc.

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If you pinch your index finger in a door, pain sensations are carried via the ________ nerve.

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In the patellar tendon reflex arc, the patellar ligament is stretched, which stretches the quadriceps femoris muscle of the thigh. This reflex will cause the quadriceps femoris to ________ and the hamstrings to ________.

Correct AnswerverifiedShow Answer

When a person sits on a hard surface for a period of time, his foot or leg may "go to sleep." This sensation is the result of compressing the ________ nerve.

Correct AnswerverifiedShow Answer

Which of the following would explain the loss of certain sensations from the skin of the posterior region of the upper limb?

Correct AnswerverifiedShow Answer

Spinal nerves C5-T1 make up the ________ plexus.

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-The figure illustrates a cross section of the spinal cord. Which structure is indicated by "E"?

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Match the action with the specific reflex. -Partially responsible for a weight lifter suddenly dropping a weight that is too heavy

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Because the stretch reflexes can be traced back along certain spinal nerve routes,

Correct AnswerverifiedShow Answer

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In the patellar tendon reflex arc, the patellar ligament is stretched, which stretches the quadriceps femoris muscle of the thigh. This reflex will cause the quadriceps femoris to and the hamstrings to .

Correct Answer
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