Question 1

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

Accepted Answer

A)   Central canal
B)   Ventral root
C)   Dorsal root ganglion
D)   Spinal nerve
E)   Dorsal rootF) A) and C)
G) C) and D)

Question 2

Which of the following nerves is part of the brachial plexus?

Accepted Answer

A)   Peroneal
B)   Ansa cervicalis
C)   Sciatic
D)   Musculocutaneous
E)   FemoralF) B) and E)
G) A) and E)

Question 3

The conus medullaris

Accepted Answer

A)   anchors the spinal cord to the coccyx.
B)   is a tapered, cone like region immediately inferior to the lumbar enlargement.
C)   marks the exit of nerves to the upper extremity.
D)   is located adjacent to the foramen magnum.
E)   is inferior to the cauda equina.F) D) and E)
G) C) and E)

Question 4

The knee-jerk reflex involves which of the following?

Accepted Answer

A)   Sensory and motor neurons
B)   Sensory neuron, interneuron, and motor neuron
C)   Sensory neuron, motor neuron, and inhibitory interneurons
D)   Sensory neuron and interneuron
E)   The brainF) A) and B)
G) All of the above

Question 5

What is found in the lateral gray horns of the spinal cord?

Accepted Answer

A)   The cell bodies of somatic motor neurons
B)   The cell bodies of sensory neurons
C)   The cell bodies of autonomic motor neurons
D)   The cell bodies of somatic sensory neuronsE) B) and D)
F) A) and C)

Question 6

Initiating the withdrawal reflex in both legs at the same time would cause one to

Accepted Answer

A)   maintain posture longer.
B)   fall.
C)   decrease muscle tension.
D)   develop resistance in one limb and reduce resistance in the other.
E)   hop.F) B) and D)
G) All of the above

Question 7

When someone taps you on your shoulder, they stimulate the ________ nerve.

Accepted Answer

A)   axillary
B)   brachial
C)   radial
D)   musculocutaneous
E)   ulnarF) None of the above
G) A) and E)

Question 8

The sac surrounding the spinal cord is the ________.

Accepted Answer

A)   dural sac
B)   meningeal sac
C)   thecal sac
D)   epidural sacE) B) and C)
F) B) and D)

Question 9

Improper use of crutches could cause compression of the ________ nerve.

Accepted Answer

A)   axillary
B)   radial
C)   musculocutaneous
D)   ulnar
E)   medianF) B) and D)
G) A) and B)

Question 10

Match the nerve or plexus with its appropriate description.
-Common fibular nerve

Accepted Answer

A)   Innervates the iliopsoas, sartorius, and quadriceps femoris
B)   Innervates muscles of the pelvic floor
C)   Innervates the muscles that adduct the thigh
D)   Innervates the anterior and lateral muscles of the leg
E)   Branches to form the medial and lateral plantar nervesF) A) and D)
G) A) and C)

Question 11

Muscle spindles

Accepted Answer

A)   are innervated by gamma motor neurons.
B)   originate in the spinal cord.
C)   are specialized nerve cells.
D)   are found encapsulated in nerve endings.
E)   are innervated by alpha motor neurons.F) D) and E)
G) A) and B)

Question 12

Which portion of a reflex arc is most likely to be located entirely within the central nervous system?

Accepted Answer

A)   Sensory neuron
B)   Motor neuron
C)   Effector
D)   Interneuron
E)   Sensory receptorF) A) and D)
G) C) and E)

Question 13

Ventral rami of some spinal nerves join with each other to form a ________.

Accepted Answer

A)   ganglion
B)   dermatome
C)   cord
D)   plexus
E)   nerveF) A) and E)
G) A) and C)

Question 14

Intercostal nerves are formed from the

Accepted Answer

A)   thoracic plexus.
B)   ventral rami of thoracic spinal nerves.
C)   dorsal rami of thoracic spinal nerves.
D)   rami communicans of the thoracic spinal nerves.
E)   cervical plexus.F) All of the above
G) A) and B)

Question 15

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

Accepted Answer

A)   Central canal
B)   Ventral root
C)   Dorsal root ganglion
D)   Spinal nerve
E)   Dorsal rootF) B) and C)
G) C) and D)

Question 16

Match the nerve or plexus with its appropriate description.
-Femoral nerve

Accepted Answer

A)   Innervates the iliopsoas, sartorius, and quadriceps femoris
B)   Innervates muscles of the pelvic floor
C)   Innervates the muscles that adduct the thigh
D)   Innervates the anterior and lateral muscles of the leg
E)   Branches to form the medial and lateral plantar nervesF) A) and E)
G) None of the above

Question 17

An abnormal patellar reflex indicates damage of the T10 - T12 spinal segments.

Accepted Answer

A) True 
 B)False

Question 18

The branch of a spinal nerve that innervates deep muscles on the dorsal thorax is the ________.

Accepted Answer

A)   ramus communicans
B)   lateral ramus
C)   dorsal ramus
D)   ventral ramus
E)   medial ramusF) A) and E)
G) All of the above

Question 19

If the ventral root of a spinal nerve were cut, the regions innervated by that spinal nerve would experience complete loss of ________.

Accepted Answer

A)   sensation
B)   movement
C)   sensation and movement
D)   pain
E)   None of the choices are correct.F) B) and D)
G) A) and B)

Question 20

-What does "B" represent?

Accepted Answer

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

Exam 12: Spinal Cord and Spinal Nerves

Improper use of crutches could cause compression of the ________ nerve.

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Which portion of a reflex arc is most likely to be located entirely within the central nervous system?

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The knee-jerk reflex involves which of the following?

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

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The branch of a spinal nerve that innervates deep muscles on the dorsal thorax is the ________.

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An abnormal patellar reflex indicates damage of the T10 - T12 spinal segments.

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The sac surrounding the spinal cord is the ________.

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Which of the following nerves is part of the brachial plexus?

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When someone taps you on your shoulder, they stimulate the ________ nerve.

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Match the nerve or plexus with its appropriate description. -Femoral nerve

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What is found in the lateral gray horns of the spinal cord?

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Initiating the withdrawal reflex in both legs at the same time would cause one to

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The conus medullaris

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Match the nerve or plexus with its appropriate description. -Common fibular nerve

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Ventral rami of some spinal nerves join with each other to form a ________.

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-What does "B" represent?

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If the ventral root of a spinal nerve were cut, the regions innervated by that spinal nerve would experience complete loss of ________.

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Muscle spindles

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

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Intercostal nerves are formed from the

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