Question 1

In a lumbar puncture (spinal tap) ,fluid is extracted from the

Accepted Answer

A)  central canal of the spinal cord.
B)  epidural space.
C)  subdural space.
D)  epiphyseal space.
E)  subarachnoid space.F) C) and E)
G) D) and E)

Question 2

What reflex flexes the toes when the inferior surface of the foot is stroked?

Accepted Answer

A)  Cremasteric reflex
B)  Patellar reflex
C)  Abdominal reflex
D)  Achilles reflex
E)  Plantar reflexF) D) and E)
G) A) and D)

Question 3

The thin strand of pia mater that helps to anchor the spinal cord to the coccyx is the

Accepted Answer

A)  conus medullaris.
B)  cervical enlargement.
C)  terminus coccyx.
D)  filum terminale.
E)  coccygeal tendon.F) C) and D)
G) B) and E)

Question 4

A diminished reflex response that may indicate damage to a segment of the spinal cord is a(n) _____ reflex.

Accepted Answer

A)  hypoactive
B)  hyperactive
C)  diminutive
D)  ponderous
E)  excessiveF) A) and B)
G) None of the above

Question 5

Following an injury to his arm,a patient complains that he has no sensations from the thumb,index finger,middle finger,and part of the ring finger.You suspect that he has damaged the

Accepted Answer

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

Question 6

The simple knee-jerk reflex is an example of a(n) _____ reflex.

Accepted Answer

A)  ipsilateral
B)  contralateral
C)  monosynaptic
D)  crossed-extensor
E)  multisynapticF) C) and D)
G) A) and B)

Question 7

This nerve receives sensation from the skin of the external genitalia.

Accepted Answer

A)  Pudendal nerve
B)  Sciatic nerve
C)  Obturator nerve
D)  Genitofemoral nerve
E)  Tibial nerveF) A) and B)
G) A) and C)

Question 8

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

Question 9

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

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

Question 11

This figure shows a cross section of a vertebra and the spinal cord.What structure does number 1 indicate?

Accepted Answer

A)  Epidural space
B)  Pia mater
C)  Subarachnoid space
D)  Central canal
E)  Dura materF) C) and D)
G) B) and E)

Question 12

The plexus that supplies the upper limbs is the _________ plexus.

Accepted Answer

A)  cervical
B)  brachial
C)  branchial
D)  lumbar
E)  coccygealF) A) and E)
G) All of the above

Question 13

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) A) and E)
G) A) and D)

Question 14

The spinal cord and spinal nerves are exclusively responsible for some reflexes.

Accepted Answer

A) True 
 B)False

Question 15

The spinal cord allows for two-way communication between the brain and body.

Accepted Answer

A) True 
 B)False

Question 16

The posterior ramus of a typical spinal nerve innervates the

Accepted Answer

A)  deep muscles of the back and the skin of the back.
B)  major thoracic and abdominal organs.
C)  abdominal wall.
D)  anterior and lateral trunk and the limbs.
E)  special senses.F) None of the above
G) C) and D)

Question 17

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

Question 18

The anterior ramus of a typical spinal nerve innervates the

Accepted Answer

A)  deep muscles of the back and the skin of the back.
B)  major thoracic and abdominal organs.
C)  abdominal wall.
D)  anterior and lateral trunk and the limbs.
E)  special senses.F) C) and E)
G) A) and B)

Question 19

The plexus formed from the anterior rami of L4-S4 is the ________ plexus.

Accepted Answer

A)  intercostal
B)  cervical
C)  brachial
D)  lumbar
E)  sacralF) None of the above
G) B) and C)

Question 20

Spinal nerves exit the vertebral canal and travel through an intervertebral foramen above or below the vertebra of the same number.The exception is

Accepted Answer

A)  C4.
B)  C8.
C)  T1.
D)  L5.
E)  S8.F) B) and E)
G) D) and E)

Exam 16: Spinal Cord and Spinal Nerves

The anterior ramus of a typical spinal nerve innervates the

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The thin strand of pia mater that helps to anchor the spinal cord to the coccyx is the

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A diminished reflex response that may indicate damage to a segment of the spinal cord is a(n) _____ reflex.

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The plexus that supplies the upper limbs is the _________ plexus.

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In a lumbar puncture (spinal tap) ,fluid is extracted from the

Correct AnswerverifiedShow Answer

This figure shows a cross section of a vertebra and the spinal cord.What structure does number 1 indicate?

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The spinal cord and spinal nerves are exclusively responsible for some reflexes.

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Which of these spinal nerve counts is incorrect?

Correct AnswerverifiedShow Answer

The lateral horns of the spinal cord contain

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This nerve receives sensation from the skin of the external genitalia.

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The spinal cord allows for two-way communication between the brain and body.

Correct AnswerverifiedShow Answer

A typical spinal cord in an adult is

Correct AnswerverifiedShow Answer

The plexus formed from the anterior rami of L4-S4 is the ________ plexus.

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Spinal nerves exit the vertebral canal and travel through an intervertebral foramen above or below the vertebra of the same number.The exception is

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 simple knee-jerk reflex is an example of a(n) _____ reflex.

Correct AnswerverifiedShow Answer

What reflex flexes the toes when the inferior surface of the foot is stroked?

Correct AnswerverifiedShow Answer

Following an injury to his arm,a patient complains that he has no sensations from the thumb,index finger,middle finger,and part of the ring finger.You suspect that he has damaged 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 posterior ramus of a typical spinal nerve innervates the

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