Question 1

The patellar or knee-jerk reflex is a classic example of

Accepted Answer

A)   the Golgi tendon reflex.
B)   the withdrawal reflex.
C)   the stretch reflex.
D)   the crossed extensor reflex.
E)   reciprocal innervation.F) B) and C)
G) None of the above C

Question 2

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 E)
G) C) and D)

Question 3

Match the nerve to the correct function.
-musculocutaneous nerve

Accepted Answer

A)  provides motor innervation to the biceps brachii
B)  innervates two forearm muscles plus most of the intrinsic hand muscles
C)  innervates all but one of the flexor muscles of the forearm and most of the hand muscles near the thumb
D)  innervates the deltoid and teres minor muscles
E)  innervates the triceps brachiiF) A) and E)
G) All of the above

Question 4

Match the nerve with the appropriate description.
-associated with withdrawal and stretch reflex

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) C) and D)
G) B) and D)

Question 5

Match the disorder with its description.
-neuritis

Accepted Answer

A)  pain radiating down the back of the thigh and leg
B)  stiffness in the neck and headache
C)  inflammation of a nerve
D)  pain along a nerve tract
E)  loss of sensationF) A) and C)
G) B) and E)

Question 6

Gamma motor neurons

Accepted Answer

A)   are located in tendons.
B)   transmit action potentials to skeletal muscle.
C)   regulate the sensitivity of the muscle spindle.
D)   enable the brain to perceive that a muscle has been stretched.
E)   innervate the whole muscle.F) B) and E)
G) None of the above C

Question 7

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) B) and D)
G) A) and B) B

Question 8

If a person fell down the steps and then developed pain down his anterior thigh into the knee, which of the following spinal nerves was probably damaged?

Accepted Answer

A)   obturator
B)   femoral
C)   tibial
D)   common fibular (peroneal) 
E)   pudendalF) B) and C)
G) C) and D)

Question 9

What structure anchors the thecal sac and conus medullaris to the coccyx?

Accepted Answer

A)   filum terminale
B)   denticulate ligaments
C)   pia mater
D)   cauda equinaE) A) and C)
F) C) and D)

Question 10

What structure makes the dorsal root different from the ventral root?

Accepted Answer

A)   The dorsal root has a ganglion.
B)   The dorsal root has a tract.
C)   The dorsal root has a nucleus.
D)   The dorsal root appears the same as the ventral root.E) B) and C)
F) A) and B)

Question 11

Match the nerve with the 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 C)
G) A) and B)

Question 12

Match the nerve to the correct function.
-radial nerve

Accepted Answer

A)  provides motor innervation to the biceps brachii
B)  innervates two forearm muscles plus most of the intrinsic hand muscles
C)  innervates all but one of the flexor muscles of the forearm and most of the hand muscles near the thumb
D)  innervates the deltoid and teres minor muscles
E)  innervates the triceps brachiiF) C) and D)
G) B) and C)

Question 13

Which of the following nerves is associated with the lumbosacral plexus?

Accepted Answer

A)   phrenic
B)   median
C)   musculocutaneous
D)   ulnar
E)   obturatorF) All of the above
G) B) and D)

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) None of the above
G) C) and D)

Question 15

A man was in an accident and severed his spinal cord between C6 and C7. Which of the following would NOT occur?

Accepted Answer

A)   loss of sensation in the trunk below the shoulders, the lower limbs and portions of the arms
B)   loss of use of the phrenic nerves and paralysis of the diaphragm
C)   loss of movement in the lower limbs
D)   loss of the use of the intercostals nerves, and breathing would be affected because the intercostals muscles would be paralyzed
E)   loss of sensation and movement in the jawF) A) and B)
G) C) and D)

Question 16

The spinal cord begins at the

Accepted Answer

A)   cerebellum.
B)   medulla oblongata.
C)   foramen magnum.
D)   conus medullaris
E)   1st cervical vertebrae.F) B) and E)
G) A) and B)

Question 17

The endoneurium

Accepted Answer

A)   surrounds nerve cell bodies.
B)   surrounds individual axons and their Schwann cells.
C)   bundles axons into fascicles.
D)   bundles fascicles into nerves.
E)   surrounds nerve tracts in the spinal cord.F) A) and E)
G) B) and C)

Question 18

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) B) and D)
G) A) and B)

Question 19

What is found in the dorsal root ganglion?

Accepted Answer

A)   The cell bodies of multipolar motor neurons.
B)   The cell bodies of pseudo-unipolar sensory neurons.
C)   The cell bodies of multipolar interneurons.
D)   The cell bodies of bipolar sensory neurons.E) C) and D)
F) None of the above

Question 20

The cutaneous sensory distribution of a spinal nerve can be mapped as a

Accepted Answer

A)   dermatome.
B)   plexitome.
C)   microtome.
D)   myotome.
E)   superdome.F) A) and B)
G) A) and C)

Exam 12: Spinal Cord and Spinal Nerves

The patellar or knee-jerk reflex is a classic example of

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

Match the nerve to the correct function. -musculocutaneous nerve

Correct AnswerverifiedShow Answer

Match the nerve with the appropriate description. -associated with withdrawal and stretch reflex

Correct AnswerverifiedShow Answer

Match the disorder with its description. -neuritis

Correct AnswerverifiedShow Answer

Gamma motor neurons

Correct AnswerverifiedC

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 AnswerverifiedB

If a person fell down the steps and then developed pain down his anterior thigh into the knee, which of the following spinal nerves was probably damaged?

Correct AnswerverifiedShow Answer

What structure anchors the thecal sac and conus medullaris to the coccyx?

Correct AnswerverifiedShow Answer

What structure makes the dorsal root different from the ventral root?

Correct AnswerverifiedShow Answer

Match the nerve with the appropriate description. -common fibular nerve

Correct AnswerverifiedShow Answer

Match the nerve to the correct function. -radial nerve

Correct AnswerverifiedShow Answer

Which of the following nerves is associated with the lumbosacral plexus?

Correct AnswerverifiedShow Answer

Intercostal nerves are formed from the

Correct AnswerverifiedShow Answer

A man was in an accident and severed his spinal cord between C6 and C7. Which of the following would NOT occur?

Correct AnswerverifiedShow Answer

The spinal cord begins at the

Correct AnswerverifiedShow Answer

The endoneurium

Correct AnswerverifiedShow Answer

The conus medullaris

Correct AnswerverifiedShow Answer

What is found in the dorsal root ganglion?

Correct AnswerverifiedShow Answer

The cutaneous sensory distribution of a spinal nerve can be mapped as a

Correct AnswerverifiedShow Answer

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