Question 1

Define stretch reflex.

Accepted Answer

A)  A stretch reflex is an example of a withdrawal reflex that contracts the flexor muscles of a limb in response to a painful stimulus.
B)  A stretch reflex is a polysynaptic reflex that activates extensor muscles in the opposite leg or arm when a flexor reflex is activated.
C)  A stretch reflex is a monosynaptic reflex that activates extensor muscles in the opposite leg or arm when a flexor reflex is activated.
D)  A stretch reflex is a monosynaptic reflex that provides regulation of skeletal muscle length.
E)  A stretch reflex is a polysynaptic reflex that provides regulation of skeletal muscle length.F) B) and E)
G) C) and D)

Question 2

A(n) ________ reflex has at least one interneuron placed between the sensory and motor neurons.

Accepted Answer

A)  sensory
B)  motor
C)  polysynaptic
D)  monosynaptic
E)  integrativeF) A) and E)
G) B) and D)

Question 3

The face,head,and cheeks are located in a dermatome supplied by nerves from what spinal cord region?

Accepted Answer

A)  sacral
B)  thoracic
C)  cervical
D)  lumbar
E)  No spinal nerves innervate the dermatome containing the face.F) D) and E)
G) A) and B)

Question 4

If a person has a crush injury to the C3-C5 spinal segments,you would expect that he

Accepted Answer

A)  might be unable to breathe on his own.
B)  could walk without difficulty.
C)  would have full range of motion in all extremities.
D)  would be in a coma.
E)  would exhibit none of the above.F) C) and D)
G) A) and E)

Question 5

Reflexes based on synapses formed during development are ________ reflexes.

Accepted Answer

A)  visceral
B)  innate
C)  acquired
D)  somatic
E)  vegetativeF) A) and C)
G) C) and E)

Question 6

What purpose does reflex testing serve?

Accepted Answer

A)  Reflex testing provides information about resting muscle tone.
B)  Reflex testing provides information about muscle strength.
C)  Reflex testing provides information about sensory receptors.
D)  Reflex testing provides information about the memory of a subject.
E)  Reflex testing provides information about the nervous system's functional status.F) A) and C)
G) B) and C)

Question 7

Which kind of neural circuit processes information in a stepwise fashion,one neuron to another?

Accepted Answer

A)  divergent
B)  serial processing
C)  convergent
D)  parallel processing
E)  reverberationF) A) and B)
G) A) and E)

Question 8

The flexor reflex

Accepted Answer

A)  prevents a muscle from overstretching.
B)  prevents a muscle from generating damaging tension.
C)  moves a limb away from a painful stimulus.
D)  usually depends on cranial neurons.
E)  is an example of a monosynaptic reflex.F) A) and B)
G) A) and C)

Question 9

As the ________ nerve approaches the knee,it divides into two branches,the fibular nerve and the tibial nerve.

Accepted Answer

A)  perineal
B)  femoral
C)  brachial
D)  pudendal
E)  sciaticF) A) and B)
G) A) and C)

Question 10

Define a nerve plexus trunk and cord.

Accepted Answer

A)  A nerve plexus trunk is a large bundle of axons from several spinal nerves; a nerve plexus cord is a smaller branch of nerves that originates at a trunk.
B)  A nerve plexus trunk is a small bundle of axons from several spinal nerves; a nerve plexus cord is a larger branch of nerves that originates at a trunk.
C)  A nerve plexus trunk consists of the posterior rami of each spinal nerve; a nerve plexus cord is a division of each trunk.
D)  A nerve plexus trunk is a small division of a nerve plexus cord; a nerve plexus cord is a larger branch from the posterior rami of spinal nerves.
E)  A nerve plexus trunk consists of the posterior rami of spinal nerves; a nerve plexus cord consists of the anterior rami of spinal nerves.F) B) and C)
G) B) and E)

Question 11

Each peripheral nerve provides ________ innervation to peripheral structures.

Accepted Answer

A)  only motor
B)  only sensory
C)  both motor and sensory
D)  either motor or sensory
E)  motor and/or sensoryF) A) and E)
G) B) and D)

Question 12

The nerve crucial for breathing that originates within the cervical plexus is called the ________ nerve.

Accepted Answer

A)  ansa cervicalis
B)  great auricular
C)  transverse cervical
D)  phrenic
E)  supraclavicularF) B) and D)
G) B) and C)

Question 13

Describe the gross anatomical features of a cross section of spinal cord.

Accepted Answer

Gross anatomical features of the cross-s...

Question 14

Figure 12-2
-Identify the structure labeled "8."

Accepted Answer

A)  peripheral nerve
B)  posterior ramus
C)  spinal nerve
D)  anterior root
E)  posterior rootF) D) and E)
G) A) and D)

Question 15

Spinal nerves from the sacral region of the cord innervate the ________ muscles.

Accepted Answer

A)  shoulder
B)  intercostal
C)  abdominal
D)  leg
E)  facialF) None of the above
G) A) and C)

Question 16

The tough,fibrous,outermost covering of the spinal cord is the

Accepted Answer

A)  arachnoid mater.
B)  pia mater.
C)  dura mater.
D)  epidural space.
E)  periosteum.F) A) and B)
G) A) and C)

Question 17

The layer of connective tissue that surrounds individual axons within a peripheral nerve is termed the

Accepted Answer

A)  endoneurium.
B)  perineurium.
C)  epineurium.
D)  metaneurium.
E)  subneurium.F) C) and D)
G) D) and E)

Question 18

The ________ nerve,which arises in the cervical plexus,innervates the diaphragm.

Accepted Answer

A)  ansa cervicalis
B)  lesser occipital
C)  radial
D)  phrenic
E)  sciaticF) All of the above
G) A) and D)

Question 19

Describe a dermatome.

Accepted Answer

A)  A dermatome is the total area of skin that contains sensory neurons.
B)  A dermatome is the region of skeletal muscle that can respond to spinal reflexes.
C)  A dermatome is the sensory region that can trigger spinal reflexes.
D)  A dermatome is the unilateral sensory region monitored by a single sensory nerve.
E)  A dermatome is the bilateral sensory region monitored by a single pair of spinal nerves.F) A) and D)
G) B) and C)

Question 20

A person with polio has lost the use of his leg muscles.In which area of his spinal cord would you expect the virus-infected motor neurons to be?

Accepted Answer

A)  anterior gray horns
B)  posterior gray horns
C)  lateral gray horns
D)  posterior white column
E)  gray commissuresF) A) and C)
G) B) and C)

Exam 12: The Spinal Cord, spinal Nerves, and Spinal Reflexes

If a person has a crush injury to the C3-C5 spinal segments,you would expect that he

Correct AnswerverifiedShow Answer

The face,head,and cheeks are located in a dermatome supplied by nerves from what spinal cord region?

Correct AnswerverifiedShow Answer

Which kind of neural circuit processes information in a stepwise fashion,one neuron to another?

Correct AnswerverifiedShow Answer

A(n) ________ reflex has at least one interneuron placed between the sensory and motor neurons.

Correct AnswerverifiedShow Answer

The flexor reflex

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Figure 12-2 -Identify the structure labeled "8."

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Each peripheral nerve provides ________ innervation to peripheral structures.

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Describe a dermatome.

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The ________ nerve,which arises in the cervical plexus,innervates the diaphragm.

Correct AnswerverifiedShow Answer

Define stretch reflex.

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A person with polio has lost the use of his leg muscles.In which area of his spinal cord would you expect the virus-infected motor neurons to be?

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As the ________ nerve approaches the knee,it divides into two branches,the fibular nerve and the tibial nerve.

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Describe the gross anatomical features of a cross section of spinal cord.

Correct AnswerverifiedGross anatomical features of the cross-s...View AnswerShow Answer

What purpose does reflex testing serve?

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The nerve crucial for breathing that originates within the cervical plexus is called the ________ nerve.

Correct AnswerverifiedShow Answer

The tough,fibrous,outermost covering of the spinal cord is the

Correct AnswerverifiedShow Answer

Reflexes based on synapses formed during development are ________ reflexes.

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The layer of connective tissue that surrounds individual axons within a peripheral nerve is termed the

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Spinal nerves from the sacral region of the cord innervate the ________ muscles.

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Define a nerve plexus trunk and cord.

Correct AnswerverifiedShow Answer

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Gross anatomical features of the cross-s...
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