Question 1

Match the nerve with the appropriate description.
-partially responsible for a weight lifter suddenly dropping a weight that is too heavy

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) B) and C)
G) C) and E)

Question 2

The perineurium

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)   bundles fascicles into axons.F) A) and B)
G) A) and D)

Question 3

If a withdrawal reflex is initiated in one leg, the crossed extensor reflex causes

Accepted Answer

A)   a withdrawal reflex in the opposite leg.
B)   inhibition of abduction in the opposite leg.
C)   extension of the opposite leg.
D)   both legs to extend.
E)   flexion of both legs.F) A) and B)
G) C) and D)

Question 4

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 5

Structurally, the simplest reflex is the

Accepted Answer

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

Question 6

The spinal cord ends at the

Accepted Answer

A)   sacrum.
B)   coccyx.
C)   5th lumbar vertebrae.
D)   2nd lumbar vertebrae.E) B) and D)
F) All of the above

Question 7

Reciprocal innervation

Accepted Answer

A)   is associated with the Golgi tendon reflex.
B)   stimulates antagonistic muscles.
C)   results in reduced resistance to the reflex.
D)   reinforces the withdrawal reflex.
E)   inhibits the stretch reflex.F) D) and E)
G) A) and C)

Question 8

The brachial plexus supplies nerves that function to contract which of the following?

Accepted Answer

A)   the diaphragm
B)   intercostal muscles
C)   muscles of the arm and forearm
D)   muscles of the lower limb
E)   abdominal musclesF) A) and B)
G) A) and C)

Question 9

Stretch reflexes

Accepted Answer

A)   are learned voluntary responses.
B)   aid in maintaining proper posture.
C)   prevent muscles from being damaged by excessive tension.
D)   cause the removal of limbs from painful stimuli.
E)   prevent falling.F) A) and D)
G) None of the above

Question 10

What space, found between the vertebral wall and the dura mater, is the area for injecting anesthesia for childbirth?

Accepted Answer

A)   subarachnoid space
B)   subdural space
C)   epidural space
D)   epipial spaceE) B) and C)
F) A) and C)

Question 11

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) A) and B)

Question 12

-What does "E" represent?

Accepted Answer

A)   central canal
B)   ventral root
C)   dorsal root ganglion
D)   spinal nerve
E)   dorsal rootF) B) and E)
G) A) and E)

Question 13

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) A) and D)
G) A) and C)

Question 14

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) B) and D)
G) B) and E)

Question 15

What is found 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 neurons.E) A) and D)
F) B) and D)

Question 16

Match the nerve with the appropriate description.
-obturator 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) B) and E)
G) A) and D)

Question 17

The reflex that prevents excessive tension in a muscle is the

Accepted Answer

A)   stretch reflex.
B)   withdrawal reflex.
C)   Golgi tendon reflex.
D)   reciprocal reflex.
E)   crossed extensor reflex.F) C) and D)
G) D) and E)

Question 18

Branches of the pudendal nerve are anesthetized during childbirth before the doctor performs a(an) _______________.

Accepted Answer

The answer of Branches of the pudendal nerve are anesthetized...

Question 19

Place the following parts of a reflex arc in the correct order beginning with the sensory receptor. (1)  motor neuron
(2)  interneuron
(3)  effector
(4)  sensory neuron
(5)  sensory receptor

Accepted Answer

A)   5, 1, 2, 3, 4
B)   5, 3, 2, 4, 1
C)   5, 4, 3, 2, 1
D)   5, 2, 3, 4, 1
E)   5, 4, 2, 1, 3F) A) and C)
G) A) and B)

Question 20

A reflex that protects limbs by removing them from painful stimuli is the

Accepted Answer

A)   stretch reflex.
B)   crossed extensor reflex.
C)   Golgi tendon reflex.
D)   alternating reflex.
E)   withdrawal reflexF) C) and D)
G) B) and C)

Exam 12: Spinal Cord and Spinal Nerves

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

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Stretch reflexes

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The brachial plexus supplies nerves that function to contract which of the following?

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A reflex that protects limbs by removing them from painful stimuli is the

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Branches of the pudendal nerve are anesthetized during childbirth before the doctor performs a(an) _______________.

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Place the following parts of a reflex arc in the correct order beginning with the sensory receptor. (1) motor neuron (2) interneuron (3) effector (4) sensory neuron (5) sensory receptor

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-What does "E" represent?

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

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If a withdrawal reflex is initiated in one leg, the crossed extensor reflex causes

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The spinal cord

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What space, found between the vertebral wall and the dura mater, is the area for injecting anesthesia for childbirth?

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The spinal cord ends at the

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Match the nerve with the appropriate description. -obturator nerve

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Reciprocal innervation

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

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Match the nerve with the appropriate description. -partially responsible for a weight lifter suddenly dropping a weight that is too heavy

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In the spinal cord, white matter is organized into

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Structurally, the simplest reflex is the

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The reflex that prevents excessive tension in a muscle is the

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The perineurium

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