Question 1

In the spinal cord, white matter is organized into

Accepted Answer

A)   horns and the gray matter into columns.
B)   horns and the gray matter into roots.
C)   columns and the gray matter into horns.
D)   columns and the gray matter into tracts.E) A) and C)
F) None of the above

Question 2

A physician must administer an anesthesia directly to the CNS via the vertebral column. How many layers of the meninges must be punctured to do so?

Accepted Answer

A)   Two layers to introduce the anesthesia to the subarachnoid space
B)   None to introduce the anesthesia to the epidural space
C)   One layer to introduce the anesthesia to the subarachnoid space
D)   Three to introduce the anesthesia directly to the spinal cordE) None of the above
F) All of the above

Question 3

The largest nerve in the body is the ________ nerve.

Accepted Answer

The answer of The largest nerve in the body is...

Question 4

The sensory root of a spinal nerve is also referred to as ________ root.

Accepted Answer

A)   anterior
B)   dorsal
C)   efferent
D)   ventral
E)   lateralF) None of the above
G) B) and C) B

Question 5

The middle, thin, spider-like meninx is the ________.

Accepted Answer

A)   dura mater
B)   pia mater
C)   ecto mater
D)   arachnoid materE) B) and D)
F) A) and C)

Question 6

Muscles and glands that are capable of producing a response when stimulated by motor neurons are called ________.

Accepted Answer

A)   aponeuroses
B)   effectors
C)   neuromodulators
D)   receptors
E)   sensory organsF) B) and D)
G) A) and B) B

Question 7

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) A) and B)
G) A) and C)

Question 8

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) A) and B)
G) None of the above

Question 9

The ventral root of a spinal nerve contains ________.

Accepted Answer

A)   only sensory fibers
B)   only motor fibers
C)   only afferent fibers
D)   both sensory and motor fibers
E)   a ganglionF) C) and D)
G) A) and D) B

Question 10

-Label component "E" of the reflex arc.

Accepted Answer

A)   Sensory receptor
B)   Effector organ
C)   Sensory neuron
D)   Motor neuron
E)   InterneuronF) All of the above
G) B) and C)

Question 11

Sam is curling very heavy weights and suddenly drops them. Which reflex forced this action by Sam to prevent tendon damage?

Accepted Answer

A)   Muscle spindle reflex
B)   Golgi tendon reflex
C)   Gamma motor reflex
D)   Withdrawal reflex
E)   Alpha motor neuron reflexF) A) and D)
G) C) and D)

Question 12

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

Accepted Answer

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

Question 13

The muscles of the back contract to straighten so that you sit at a more erect posture and subsequently the muscles are suddenly stretched as you nod off. Which of the following best represents the sequence of events when you start to nod off?
(1)  Muscles of the back are stretched.
(2)  The muscle spindle is stretched.
(3)  Action potentials in sensory neurons of the muscle spindles increase.
(4)  Action potentials in alpha motor neurons of skeletal muscle fibers increase.
(5)  Skeletal muscle of the back contract.

Accepted Answer

A)   1, 2, 3, 4, 5
B)   1, 5, 2, 3, 4
C)   1, 5, 3, 2, 4
D)   5, 2, 3, 4, 1
E)   4, 5, 3, 2, 1F) All of the above
G) B) and C)

Question 14

Damage to the phrenic nerve would result in

Accepted Answer

A)   the loss of motor activity in the arms.
B)   an increased heart rate.
C)   an inability to swallow.
D)   difficulty breathing.
E)   a decreased heart rate.F) C) and D)
G) None of the above

Question 15

Match the action with the specific reflex.
-A reflex that helps prevent falls

Accepted Answer

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

Question 16

Match the disorder with its description.
-Sciatica

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

Question 17

Dennis has lost the ability to voluntarily raise his left arm due to damage to his spinal cord and associated nerves. Which of the following is a possible explanation for Dennis's symptom?

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) B) and D)
F) A) and B)

Question 18

The spinal cord

Accepted Answer

A)   controls the reticular activating system.
B)   stores reflexive memory.
C)   forms memory engrams.
D)   links the peripheral nervous system to the brain.
E)   is characterized by conscious activity.F) C) and D)
G) A) and B)

Question 19

Using the biceps brachii to flex the forearm requires innervation by the ________ nerve.

Accepted Answer

A)   radial
B)   musculocutaneous
C)   ulnar
D)   median
E)   axillaryF) B) and D)
G) A) and B)

Question 20

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

Exam 12: Spinal Cord and Spinal Nerves

In the spinal cord, white matter is organized into

Correct Answer
verified

A physician must administer an anesthesia directly to the CNS via the vertebral column. How many layers of the meninges must be punctured to do so?

Correct Answer
verified

The largest nerve in the body is the ________ nerve.

Correct Answer
verified

The sensory root of a spinal nerve is also referred to as ________ root.

Correct Answer
verified
B

The middle, thin, spider-like meninx is the ________.

Correct Answer
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Muscles and glands that are capable of producing a response when stimulated by motor neurons are called ________.

Correct Answer
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B

Gamma motor neurons

Correct Answer
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Match the nerve to the correct function. -Radial nerve

Correct Answer
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The ventral root of a spinal nerve contains ________.

Correct Answer
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B

-Label component "E" of the reflex arc.

Correct Answer
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Sam is curling very heavy weights and suddenly drops them. Which reflex forced this action by Sam to prevent tendon damage?

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Damage to the phrenic nerve would result in

Correct Answer
verified

Match the action with the specific reflex. -A reflex that helps prevent falls

Correct Answer
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Match the disorder with its description. -Sciatica

Correct Answer
verified

Dennis has lost the ability to voluntarily raise his left arm due to damage to his spinal cord and associated nerves. Which of the following is a possible explanation for Dennis's symptom?

Correct Answer
verified

The spinal cord

Correct Answer
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Using the biceps brachii to flex the forearm requires innervation by the ________ nerve.

Correct Answer
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The endoneurium

Correct Answer
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Exam 12: Spinal Cord and Spinal Nerves

In the spinal cord, white matter is organized into

Correct AnswerverifiedShow Answer

A physician must administer an anesthesia directly to the CNS via the vertebral column. How many layers of the meninges must be punctured to do so?

Correct AnswerverifiedShow Answer

The largest nerve in the body is the ________ nerve.

Correct AnswerverifiedShow Answer

The sensory root of a spinal nerve is also referred to as ________ root.

Correct AnswerverifiedB

The middle, thin, spider-like meninx is the ________.

Correct AnswerverifiedShow Answer

Muscles and glands that are capable of producing a response when stimulated by motor neurons are called ________.

Correct AnswerverifiedB

Gamma motor neurons

Correct AnswerverifiedShow Answer

Match the nerve to the correct function. -Radial nerve

Correct AnswerverifiedShow Answer

The ventral root of a spinal nerve contains ________.

Correct AnswerverifiedB

-Label component "E" of the reflex arc.

Correct AnswerverifiedShow Answer

Sam is curling very heavy weights and suddenly drops them. Which reflex forced this action by Sam to prevent tendon damage?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Damage to the phrenic nerve would result in

Correct AnswerverifiedShow Answer

Match the action with the specific reflex. -A reflex that helps prevent falls

Correct AnswerverifiedShow Answer

Match the disorder with its description. -Sciatica

Correct AnswerverifiedShow Answer

Dennis has lost the ability to voluntarily raise his left arm due to damage to his spinal cord and associated nerves. Which of the following is a possible explanation for Dennis's symptom?

Correct AnswerverifiedShow Answer

The spinal cord

Correct AnswerverifiedShow Answer

Using the biceps brachii to flex the forearm requires innervation by the ________ nerve.

Correct AnswerverifiedShow Answer

The endoneurium

Correct AnswerverifiedShow Answer

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B

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B

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B

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