Question 1

Late one night you are leaving the science building during a snowstorm. As you approach your car, your right foot suddenly slips on a patch of ice. Your left leg immediately stiffens as you try to regain your balance. The reflex action you relied upon is a(n)

Accepted Answer

A)   unilateral reflex.
B)   ipsilateral reflex.
C)   contralateral reflex.
D)   voluntary reflex.
E)   None of the choices is correct.F) B) and D)
G) B) and C)

Question 2

A typical spinal cord in an adult is

Accepted Answer

A)   24-26 inches long.
B)   12-14 inches long.
C)   8-10 inches long.
D)   16-18 inches long.
E)   20-24 inches long.F) A) and D)
G) D) and E)

Question 3

This nerve helps to plant the foot and receives sensory signals from the skin of the sole.

Accepted Answer

A)   Femoral nerve
B)   Deep fibular nerve
C)   Obturator nerve
D)   Genitofemoral nerve
E)   Tibial nerveF) C) and D)
G) All of the above

Question 4

Which accurately describes sensory and motor pathways?

Accepted Answer

A)   Sensory pathways terminate in the brain, and motor pathways terminate at effectors.
B)   Both sensory and motor pathways terminate in the brain.
C)   Both sensory and motor pathways terminate in the PNS.
D)   Sensory pathways terminate at effectors and motor pathways terminate in the brain.E) B) and C)
F) C) and D)

Question 5

The neurons that directly innervate skeletal muscles are called

Accepted Answer

A)   first-order neurons.
B)   second-order neurons.
C)   upper motor neurons.
D)   lower motor neurons.E) A) and C)
F) All of the above

Question 6

Which space associated with the spinal cord meninges contains areolar connective tissue, blood vessels, and adipose connective tissue?

Accepted Answer

A)   Subarachnoid space
B)   Epidural space
C)   Central canal
D)   Subdural space
E)   Epiarachnoid spaceF) A) and D)
G) C) and D)

Question 7

The cell bodies of lower motor neurons are housed in the posterior horns of the spinal cord.

Accepted Answer

A) True 
 B)False

Question 8

Within the axilla, axons of neurons are organized within

Accepted Answer

A)   three cords-the posterior, medial, and lateral cords.
B)   three divisions-the superior, middle, and inferior divisions.
C)   five cords-the superior, inferior, medial, lateral, and middle divisions.
D)   five divisions-proximal, distal, ulnar, median, and radial divisions.E) A) and D)
F) B) and C)

Question 9

Nerve plexuses are networks of interweaving posterior rami of spinal nerves.

Accepted Answer

A) True 
 B)False

Question 10

Anatomy of the spinal cord & spinal nerves. 
-This figure shows an anterior view of the spinal cord and meninges. What structure does number 1 indicate?

Accepted Answer

A)   Anterior root
B)   Posterior root
C)   Anterior root ganglion
D)   Posterior root ganglion
E)   Gray commissureF) C) and E)
G) A) and C)

Question 11

A monosynaptic reflex that monitors and regulates skeletal muscle length is a ________ reflex.

Accepted Answer

A)   withdrawal
B)   flexor
C)   Golgi tendon
D)   stretch
E)   hypoactiveF) B) and D)
G) B) and C)

Question 12

A person suffering from carpal tunnel syndrome has lost function of the

Accepted Answer

A)   median nerve.
B)   radial nerve.
C)   musculocutaneous nerve.
D)   ulnar nerve.
E)   axillary nerve.F) C) and E)
G) C) and D)

Question 13

The lateral horns of the spinal cord contain

Accepted Answer

A)   axons of motor neurons and interneuron cell bodies.
B)   axons of sensory and motor neurons.
C)   cell bodies of somatic sensory neurons.
D)   axons of sensory neurons and interneuron cell bodies.
E)   cell bodies of autonomic motor neurons.F) A) and D)
G) C) and D)

Question 14

Two of the nerves of the lumbar plexus are the

Accepted Answer

A)   femoral and sciatic nerves.
B)   femoral and obturator nerves.
C)   obturator and pudendal nerves.
D)   pudendal and sciatic nerves.E) B) and C)
F) A) and C)

Question 15

The axons of primary sensory neurons make synaptic connections with

Accepted Answer

A)   posterior root ganglia of spinal nerves.
B)   secondary neurons in the CNS.
C)   secondary neurons in the PNS.
D)   thalamic neurons.E) All of the above
F) B) and D)

Question 16

Anatomy of the spinal cord & spinal nerves. 
-This figure shows a cross section of the spinal cord. What structure does number 2 indicate?

Accepted Answer

A)   Lateral horn
B)   Anterior horn
C)   Gray commissure
D)   Posterior horn
E)   Posterior funiculusF) A) and E)
G) A) and B)

Question 17

The anterior spinocerebellar tract conducts signals about

Accepted Answer

A)   pain from the upper limbs.
B)   pain from the lower limbs.
C)   proprioception from the upper limbs.
D)   proprioception from the lower limbs.E) A) and B)
F) B) and C)

Question 18

Some motor pathways originate in the cerebellum.

Accepted Answer

A) True 
 B)False

Question 19

The most inferior spinal nerve is

Accepted Answer

A)   C7.
B)   C8.
C)   Co1.
D)   Co7.
E)   CN XII.F) B) and E)
G) B) and C)

Question 20

Neurons of the thalamus that are part of sensory conduction pathways are considered

Accepted Answer

A)   primary neurons.
B)   secondary neurons.
C)   tertiary neurons.
D)   quaternary neurons.E) B) and D)
F) C) and D)

Exam 14: Nervous System: Spinal Cord and Spinal Nerves

Some motor pathways originate in the cerebellum.

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Two of the nerves of the lumbar plexus are the

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Late one night you are leaving the science building during a snowstorm. As you approach your car, your right foot suddenly slips on a patch of ice. Your left leg immediately stiffens as you try to regain your balance. The reflex action you relied upon is a(n)

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A typical spinal cord in an adult is

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A monosynaptic reflex that monitors and regulates skeletal muscle length is a ________ reflex.

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Anatomy of the spinal cord & spinal nerves. -This figure shows a cross section of the spinal cord. What structure does number 2 indicate?

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Within the axilla, axons of neurons are organized within

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Neurons of the thalamus that are part of sensory conduction pathways are considered

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Anatomy of the spinal cord & spinal nerves. -This figure shows an anterior view of the spinal cord and meninges. What structure does number 1 indicate?

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Which accurately describes sensory and motor pathways?

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Which space associated with the spinal cord meninges contains areolar connective tissue, blood vessels, and adipose connective tissue?

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The neurons that directly innervate skeletal muscles are called

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The most inferior spinal nerve is

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This nerve helps to plant the foot and receives sensory signals from the skin of the sole.

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The anterior spinocerebellar tract conducts signals about

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The axons of primary sensory neurons make synaptic connections with

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Nerve plexuses are networks of interweaving posterior rami of spinal nerves.

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A person suffering from carpal tunnel syndrome has lost function of the

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The cell bodies of lower motor neurons are housed in the posterior horns of the spinal cord.

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The lateral horns of the spinal cord contain

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