Question 1

Reflexes,controlled by the spinal cord,act by

Accepted Answer

A)  sensory output over cranial nerves to effectors.
B)  motor input to reflex centers in the spinal cord.
C)  sensory input to reflex centers in the brain.
D)  motor output over spinal nerves to effectors.
E)  sensory input over cranial nerves to the spinal cord.F) D) and E)
G) A) and B)

Question 2

A disease that damages myelin sheaths would affect which portion of the spinal cord?

Accepted Answer

A)  anterior gray horns
B)  posterior gray horns
C)  lateral gray horns
D)  white matter columns
E)  gray commissuresF) A) and D)
G) None of the above

Question 3

The white matter of the spinal cord is mainly

Accepted Answer

A)  unmyelinated axons.
B)  neuroglia.
C)  Schwann cells.
D)  myelinated axons.
E)  nodes of Ranvier.F) B) and E)
G) A) and D)

Question 4

Figure 12-1
-What is the function of the structure labeled "15"?

Accepted Answer

A)  control of skeletal muscle
B)  somatic sensory processing
C)  control of autonomic effectors
D)  somatic motor control
E)  visceral sensory processingF) All of the above
G) C) and E)

Question 5

Suppose that you feel something brushing against your abdomen.The sensory information would be carried to the spinal cord over a ________ ramus.

Accepted Answer

A)  white ramus communicans
B)  gray ramus communicans
C)  posterior
D)  anterior
E)  rami communicantesF) B) and E)
G) C) and D)

Question 6

The ventral rami of spinal nerves C4 to T1 contribute fibers to the ________ plexus.

Accepted Answer

A)  cervical
B)  brachial
C)  lumbar
D)  sacral
E)  thoracicF) A) and B)
G) C) and E)

Question 7

In the spinal cord,white matter is separated into ascending and descending tracts organized as

Accepted Answer

A)  nuclei.
B)  ganglia.
C)  columns.
D)  nerves.
E)  horns.F) None of the above
G) A) and B)

Question 8

A viral disease that destroys the neuronal cell bodies of the anterior gray horn will

Accepted Answer

A)  lead to muscle weakness or paralysis.
B)  interfere with position sense.
C)  mainly interfere with crude touch and temperature sense.
D)  block autonomic regulation.
E)  interfere with communication from one side of the spinal cord to the other.F) B) and E)
G) B) and D)

Question 9

After age ________ the vertebral column continues to elongate,but the spinal cord itself does not.

Accepted Answer

A)  8
B)  12
C)  18
D)  4
E)  20F) A) and B)
G) C) and E)

Question 10

Figure 12-2
-Identify the structure labeled "6."

Accepted Answer

A)  autonomic nerve
B)  sympathetic ganglion
C)  posterior root ganglion
D)  rami communicantes
E)  ventral rootF) B) and D)
G) D) and E)

Question 11

Sometimes,when it is difficult to initiate a knee-jerk reflex by tapping the patellar tendon,a patient will be asked to voluntarily make a fist.Then the reflex will be easily evoked.What does this illustrate about the relation between voluntary and involuntary reflex movement?

Accepted Answer

Descending motor tracts that excite the ...

Question 12

Where is spinal CSF located?

Accepted Answer

A)  subarachnoid space
B)  epidural space
C)  subdural space
D)  intervertebral foramina
E)  between pedicles of adjacent vertebraeF) A) and B)
G) A) and E)

Question 13

Mary is in an automobile accident and suffers a spinal cord injury.She has lost feeling in her lower body.Her doctor tells her that swelling is compressing a portion of her spinal cord.Which part of her cord is likely to be compressed?

Accepted Answer

A)  ascending tracts in the cervical region of her spinal cord.
B)  descending tracts in the cervical region of her spinal cord.
C)  ascending tracts in the lumbar region of her spinal cord.
D)  descending tracts in the lumbar region of her spinal cord.
E)  the anterior white commissures.F) A) and D)
G) A) and B)

Question 14

What are common characteristics of reflexes?

Accepted Answer

A)  All reflexes involve contraction of skeletal muscle to pull away from a stimulus to minimize damage.
B)  All reflexes involve processing in the spinal cord.
C)  All reflexes involve processing in the brain.
D)  All reflexes involve only one synapse so they are rapid responses to stimuli.
E)  All reflexes are rapid,unconscious patterned responses to stimuli that restore or maintain homeostasis.F) A) and B)
G) A) and C)

Question 15

Describe the white and gray rami communicantes.

Accepted Answer

The gray ramus communicans is a bundle o...

Question 16

The preganglionic fibers that carry visceral motor fibers and connect a spinal nerve with an sympathetic ganglion form the

Accepted Answer

A)  white rami communicans.
B)  gray rami communicans.
C)  posterior ramus.
D)  anterior ramus.
E)  dermatomes.F) B) and D)
G) B) and E)

Question 17

Figure 12-2
-Identify the structure labeled "5."

Accepted Answer

A)  autonomic nerve
B)  autonomic ganglion
C)  rami communicantes
D)  posterior root ganglion
E)  anterior rootF) B) and E)
G) A) and D)

Question 18

Compared to the vertebral column,the spinal cord is

Accepted Answer

A)  longer.
B)  shorter.
C)  the same length.D) None of the above
E) All of the above

Question 19

Tina falls while climbing a tree and lands on her back.Her frightened parents take her to the emergency room,where she is examined.Her knee-jerk reflex is normal and she exhibits a plantar reflex (negative Babinski reflex) .These results suggest that

Accepted Answer

A)  Tina has injured one of her descending nerve tracts.
B)  Tina has injured one of her ascending nerve tracts.
C)  Tina has a spinal injury in the lumbar region.
D)  Tina has a spinal injury in the cervical region.
E)  Tina suffered no damage to her spinal cord.F) A) and E)
G) B) and E)

Question 20

Figure 12-1
-Identify the structure labeled "10."

Accepted Answer

A)  anterior white commissure
B)  anterior median fissure
C)  anterior white column
D)  anterior gray commissure
E)  anterior white hornF) A) and D)
G) C) and E)

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

Tina falls while climbing a tree and lands on her back.Her frightened parents take her to the emergency room,where she is examined.Her knee-jerk reflex is normal and she exhibits a plantar reflex (negative Babinski reflex) .These results suggest that

Correct AnswerverifiedShow Answer

The white matter of the spinal cord is mainly

Correct AnswerverifiedShow Answer

Figure 12-1 -Identify the structure labeled "10."

Correct AnswerverifiedShow Answer

Figure 12-2 -Identify the structure labeled "5."

Correct AnswerverifiedShow Answer

What are common characteristics of reflexes?

Correct AnswerverifiedShow Answer

Figure 12-1 -What is the function of the structure labeled "15"?

Correct AnswerverifiedShow Answer

A viral disease that destroys the neuronal cell bodies of the anterior gray horn will

Correct AnswerverifiedShow Answer

Figure 12-2 -Identify the structure labeled "6."

Correct AnswerverifiedShow Answer

Compared to the vertebral column,the spinal cord is

Correct AnswerverifiedShow Answer

The preganglionic fibers that carry visceral motor fibers and connect a spinal nerve with an sympathetic ganglion form the

Correct AnswerverifiedShow Answer

Mary is in an automobile accident and suffers a spinal cord injury.She has lost feeling in her lower body.Her doctor tells her that swelling is compressing a portion of her spinal cord.Which part of her cord is likely to be compressed?

Correct AnswerverifiedShow Answer

After age ________ the vertebral column continues to elongate,but the spinal cord itself does not.

Correct AnswerverifiedShow Answer

The ventral rami of spinal nerves C4 to T1 contribute fibers to the ________ plexus.

Correct AnswerverifiedShow Answer

Reflexes,controlled by the spinal cord,act by

Correct AnswerverifiedShow Answer

Where is spinal CSF located?

Correct AnswerverifiedShow Answer

In the spinal cord,white matter is separated into ascending and descending tracts organized as

Correct AnswerverifiedShow Answer

Describe the white and gray rami communicantes.

Correct AnswerverifiedThe gray ramus communicans is a bundle o...View AnswerShow Answer

Suppose that you feel something brushing against your abdomen.The sensory information would be carried to the spinal cord over a ________ ramus.

Correct AnswerverifiedShow Answer

A disease that damages myelin sheaths would affect which portion of the spinal cord?

Correct AnswerverifiedShow Answer

Sometimes,when it is difficult to initiate a knee-jerk reflex by tapping the patellar tendon,a patient will be asked to voluntarily make a fist.Then the reflex will be easily evoked.What does this illustrate about the relation between voluntary and involuntary reflex movement?

Correct AnswerverifiedDescending motor tracts that excite the ...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The gray ramus communicans is a bundle o...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Descending motor tracts that excite the ...
View Answer