Question 1

The spinal cord exhibits some reflexes that do not involve the brain.

Accepted Answer

A) True 
 B)False

Question 2

The second thoracic spinal nerve exits the spinal column through the

Accepted Answer

A)   vertebral canal of vertebrae T1, T2, and T3.
B)   sacral hiatus.
C)   intervertebral foramen between vertebrae T2 and T3.
D)   intervertebral foramen between vertebrae T1 and T2.E) C) and D)
F) All of the above

Question 3

What is the correct order for the parts of the spinal cord, from superior to inferior?

Accepted Answer

A)   Cervical - thoracic - sacral - coccygeal - lumbar
B)   Cervical - thoracic - lumbar - sacral - coccygeal
C)   Thoracic - lumbar - sacral - cervical - coccygeal
D)   Thoracic - cervical - lumbar - coccygeal - sacral
E)   Thoracic - lumbar - sacral - coccygeal - cervicalF) A) and B)
G) D) and E)

Question 4

Reflexes are described as

Accepted Answer

A)   slow and spontaneous.
B)   spontaneous and self-initiating.
C)   pre-programmed and voluntary.
D)   rapid and involuntary.E) B) and D)
F) A) and B)

Question 5

Which spinal nerves contribute to the brachial plexus?

Accepted Answer

A)   S1-Co1
B)   L1-L5
C)   C5-T1
D)   L4-S4
E)   C1-C5F) A) and B)
G) A) and C)

Question 6

In both the anterolateral pathway and the posterior funiculus-medial lemniscal pathway, the axons of the ________ neurons decussate in the CNS.

Accepted Answer

A)   primary
B)   secondary
C)   tertiary
D)   quaternaryE) A) and C)
F) A) and D)

Question 7

The alar plate of the embryo develops into the gray commissure of the spinal cord.

Accepted Answer

A) True 
 B)False

Question 8

The obturator nerve innervates muscles of the lateral thigh.

Accepted Answer

A) True 
 B)False

Question 9

A conduction pathway consists of a

Accepted Answer

A)   nerve and an effector.
B)   nerve and a tract.
C)   ganglion and a nucleus.
D)   tract and a nucleus.E) All of the above
F) A) and B)

Question 10

Which of these spinal nerve counts is incorrect?

Accepted Answer

A)   Thoracic nerves = 8 pairs
B)   Cervical nerves = 8 pairs
C)   Lumbar nerves = 5 pairs
D)   Sacral nerves = 5 pairs
E)   Coccygeal nerves = 1 pairF) All of the above
G) C) and E)

Question 11

What is the correct order for the events that occur during a reflex?
A: Impulse travels through sensory neuron to the CNS
B: A stimulus activates a receptor
C: Information is processed by interneurons
D: Motor neuron transmits impulse to effector
E: Effector responds

Accepted Answer

A)   a, b, c, d, e
B)   b, a, c, d, e
C)   c, b, a, e, d
D)   c, a, b, d, e
E)   b, d, c, a, eF) A) and E)
G) A) and B)

Question 12

This structure contains unmyelinated axons and serves as a communication route between the right and left sides of the gray matter in the spinal cord.

Accepted Answer

A)   Gray commissure
B)   White commissure
C)   Lateral commissure
D)   Posterior commissure
E)   Denticulate ligamentsF) B) and D)
G) C) and D)

Question 13

The embryonic feature that gives rise to the anterior and lateral horns of gray matter is the ________ plate.

Accepted Answer

A)   basal
B)   alar
C)   ulnar
D)   anterior
E)   posteriorF) All of the above
G) A) and E)

Question 14

When the Achilles tendon is tapped or the bottom of the foot is stroked, the reflexive response is that the foot

Accepted Answer

A)   plantar flexes.
B)   dorsiflexes.
C)   inverts.
D)   everts.E) B) and D)
F) All of the above

Question 15

Usually, awareness of the stimulus occurs before a reflex action has been initiated.

Accepted Answer

A) True 
 B)False

Question 16

The large section of spinal white matter that is found between the posterior gray horns is known as the posterior

Accepted Answer

A)   commissure.
B)   funiculus.
C)   decussation.
D)   peduncle.E) None of the above
F) C) and D)

Question 17

The most delicate of the meninges consists of elastic and collagen fibers and is known as the

Accepted Answer

A)   pia mater.
B)   dura mater.
C)   falx cerebri.
D)   arachnoid mater.E) A) and B)
F) A) and C)

Question 18

A posterior root contains

Accepted Answer

A)   sensory axons only.
B)   motor axons only.
C)   a mix of sensory and motor axons.
D)   autonomic nervous system axons.E) A) and B)
F) All of the above

Question 19

Neurons in the primary somatosensory cortex receive input from tertiary neurons that have their cell bodies residing in the thalamus.

Accepted Answer

A) True 
 B)False

Question 20

The posterior horns of the spinal cord contain

Accepted Answer

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

Exam 14: Nervous System: Spinal Cord and Spinal Nerves

Which spinal nerves contribute to the brachial plexus?

Correct AnswerverifiedShow Answer

This structure contains unmyelinated axons and serves as a communication route between the right and left sides of the gray matter in the spinal cord.

Correct AnswerverifiedShow Answer

The second thoracic spinal nerve exits the spinal column through the

Correct AnswerverifiedShow Answer

The posterior horns of the spinal cord contain

Correct AnswerverifiedShow Answer

The most delicate of the meninges consists of elastic and collagen fibers and is known as the

Correct AnswerverifiedShow Answer

What is the correct order for the events that occur during a reflex? A: Impulse travels through sensory neuron to the CNS B: A stimulus activates a receptor C: Information is processed by interneurons D: Motor neuron transmits impulse to effector E: Effector responds

Correct AnswerverifiedShow Answer

The obturator nerve innervates muscles of the lateral thigh.

Correct AnswerverifiedShow Answer

When the Achilles tendon is tapped or the bottom of the foot is stroked, the reflexive response is that the foot

Correct AnswerverifiedShow Answer

The spinal cord exhibits some reflexes that do not involve the brain.

Correct AnswerverifiedShow Answer

The embryonic feature that gives rise to the anterior and lateral horns of gray matter is the ________ plate.

Correct AnswerverifiedShow Answer

Reflexes are described as

Correct AnswerverifiedShow Answer

Neurons in the primary somatosensory cortex receive input from tertiary neurons that have their cell bodies residing in the thalamus.

Correct AnswerverifiedShow Answer

The large section of spinal white matter that is found between the posterior gray horns is known as the posterior

Correct AnswerverifiedShow Answer

What is the correct order for the parts of the spinal cord, from superior to inferior?

Correct AnswerverifiedShow Answer

Which of these spinal nerve counts is incorrect?

Correct AnswerverifiedShow Answer

A conduction pathway consists of a

Correct AnswerverifiedShow Answer

The alar plate of the embryo develops into the gray commissure of the spinal cord.

Correct AnswerverifiedShow Answer

Usually, awareness of the stimulus occurs before a reflex action has been initiated.

Correct AnswerverifiedShow Answer

A posterior root contains

Correct AnswerverifiedShow Answer

In both the anterolateral pathway and the posterior funiculus-medial lemniscal pathway, the axons of the ________ neurons decussate in the CNS.

Correct AnswerverifiedShow Answer

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