Question 1

Which portion of a reflex arc is most likely to be located entirely within the central nervous system?

Accepted Answer

A)  Sensory neuron 
B)  Motor neuron 
C)  Effector 
D)  Interneuron 
E)  Sensory receptor 
A)  Sensory neuron 
B)  Motor neuron 
C)  Effector 
D)  Interneuron 
E)  Sensory receptor

Question 2

Ventral rami of some spinal nerves join with each other to form a ________.

Accepted Answer

A)  ganglion 
B)  dermatome 
C)  cord 
D)  plexus 
E)  nerve 
A)  ganglion 
B)  dermatome 
C)  cord 
D)  plexus 
E)  nerve

Question 3

An abnormal patellar reflex indicates damage of the T10 - T12 spinal segments.

Accepted Answer

A) True 
 B)False

Question 4

-The figure illustrates a cross section of the spinal cord. Which structure is indicated by "A"?

Accepted Answer

A)  Central canal 
B)  Ventral root 
C)  Dorsal root ganglion 
D)  Spinal nerve 
E)  Dorsal root 
A)  Central canal 
B)  Ventral root 
C)  Dorsal root ganglion 
D)  Spinal nerve 
E)  Dorsal root

Question 5

-What does "B" represent?

Accepted Answer

A)  Spinal nerves 
B)  Conus medullaris 
C)  Cervical enlargement 
D)  Filium terminale 
E)  Cauda equina 
A)  Spinal nerves 
B)  Conus medullaris 
C)  Cervical enlargement 
D)  Filium terminale 
E)  Cauda equina

Question 6

-The figure illustrates a cross section of the spinal cord. Which structure is indicated by "B"?

Accepted Answer

A)  Central canal 
B)  Ventral root 
C)  Dorsal root ganglion 
D)  Spinal nerve 
E)  Dorsal root 
A)  Central canal 
B)  Ventral root 
C)  Dorsal root ganglion 
D)  Spinal nerve 
E)  Dorsal root

Question 7

Improper use of crutches could cause compression of the ________ nerve.

Accepted Answer

A)  axillary 
B)  radial 
C)  musculocutaneous 
D)  ulnar 
E)  median 
A)  axillary 
B)  radial 
C)  musculocutaneous 
D)  ulnar 
E)  median

Question 8

When someone taps you on your shoulder, they stimulate the ________ nerve.

Accepted Answer

A)  axillary 
B)  brachial 
C)  radial 
D)  musculocutaneous 
E)  ulnar 
A)  axillary 
B)  brachial 
C)  radial 
D)  musculocutaneous 
E)  ulnar

Question 9

Muscle spindles

Accepted Answer

A)  are innervated by gamma motor neurons. 
B)  originate in the spinal cord. 
C)  are specialized nerve cells. 
D)  are found encapsulated in nerve endings. 
E)  are innervated by alpha motor neurons. 
A)  are innervated by gamma motor neurons. 
B)  originate in the spinal cord. 
C)  are specialized nerve cells. 
D)  are found encapsulated in nerve endings. 
E)  are innervated by alpha motor neurons.

Question 10

If the ventral root of a spinal nerve were cut, the regions innervated by that spinal nerve would experience complete loss of ________.

Accepted Answer

A)  sensation 
B)  movement 
C)  sensation and movement 
D)  pain 
E)  None of the choices are correct. 
A)  sensation 
B)  movement 
C)  sensation and movement 
D)  pain 
E)  None of the choices are correct.

Question 11

Initiating the withdrawal reflex in both legs at the same time would cause one to

Accepted Answer

A)  maintain posture longer. 
B)  fall. 
C)  decrease muscle tension. 
D)  develop resistance in one limb and reduce resistance in the other. 
E)  hop. 
A)  maintain posture longer. 
B)  fall. 
C)  decrease muscle tension. 
D)  develop resistance in one limb and reduce resistance in the other. 
E)  hop.

Question 12

The knee-jerk reflex involves which of the following?

Accepted Answer

A)  Sensory and motor neurons 
B)  Sensory neuron, interneuron, and motor neuron 
C)  Sensory neuron, motor neuron, and inhibitory interneurons 
D)  Sensory neuron and interneuron 
E)  The brain 
A)  Sensory and motor neurons 
B)  Sensory neuron, interneuron, and motor neuron 
C)  Sensory neuron, motor neuron, and inhibitory interneurons 
D)  Sensory neuron and interneuron 
E)  The brain

Question 13

Match the nerve or plexus with its appropriate description.
-Common fibular nerve

Accepted Answer

A)  Innervates the iliopsoas, sartorius, and quadriceps femoris 
B)  Innervates muscles of the pelvic floor 
C)  Innervates the muscles that adduct the thigh 
D)  Innervates the anterior and lateral muscles of the leg 
E)  Branches to form the medial and lateral plantar nerves 
A)  Innervates the iliopsoas, sartorius, and quadriceps femoris 
B)  Innervates muscles of the pelvic floor 
C)  Innervates the muscles that adduct the thigh 
D)  Innervates the anterior and lateral muscles of the leg 
E)  Branches to form the medial and lateral plantar nerves

Question 14

Which of the following nerves is part of the brachial plexus?

Accepted Answer

A)  Peroneal 
B)  Ansa cervicalis 
C)  Sciatic 
D)  Musculocutaneous 
E)  Femoral 
A)  Peroneal 
B)  Ansa cervicalis 
C)  Sciatic 
D)  Musculocutaneous 
E)  Femoral

Question 15

The conus medullaris

Accepted Answer

A)  anchors the spinal cord to the coccyx. 
B)  is a tapered, cone like region immediately inferior to the lumbar enlargement. 
C)  marks the exit of nerves to the upper extremity. 
D)  is located adjacent to the foramen magnum. 
E)  is inferior to the cauda equina. 
A)  anchors the spinal cord to the coccyx. 
B)  is a tapered, cone like region immediately inferior to the lumbar enlargement. 
C)  marks the exit of nerves to the upper extremity. 
D)  is located adjacent to the foramen magnum. 
E)  is inferior to the cauda equina.

Question 16

Intercostal nerves are formed from the

Accepted Answer

A)  thoracic plexus. 
B)  ventral rami of thoracic spinal nerves. 
C)  dorsal rami of thoracic spinal nerves. 
D)  rami communicans of the thoracic spinal nerves. 
E)  cervical plexus. 
A)  thoracic plexus. 
B)  ventral rami of thoracic spinal nerves. 
C)  dorsal rami of thoracic spinal nerves. 
D)  rami communicans of the thoracic spinal nerves. 
E)  cervical plexus.

Question 17

The sac surrounding the spinal cord is the ________.

Accepted Answer

A)  dural sac 
B)  meningeal sac 
C)  thecal sac 
D)  epidural sac 
A)  dural sac 
B)  meningeal sac 
C)  thecal sac 
D)  epidural sac

Question 18

The branch of a spinal nerve that innervates deep muscles on the dorsal thorax is the ________.

Accepted Answer

A)  ramus communicans 
B)  lateral ramus 
C)  dorsal ramus 
D)  ventral ramus 
E)  medial ramus 
A)  ramus communicans 
B)  lateral ramus 
C)  dorsal ramus 
D)  ventral ramus 
E)  medial ramus

Question 19

What is found in the lateral gray horns of the spinal cord?

Accepted Answer

A)  The cell bodies of somatic motor neurons 
B)  The cell bodies of sensory neurons 
C)  The cell bodies of autonomic motor neurons 
D)  The cell bodies of somatic sensory neurons 
A)  The cell bodies of somatic motor neurons 
B)  The cell bodies of sensory neurons 
C)  The cell bodies of autonomic motor neurons 
D)  The cell bodies of somatic sensory neurons

Question 20

Match the nerve or plexus with its appropriate description.
-Femoral nerve

Accepted Answer

A)  Innervates the iliopsoas, sartorius, and quadriceps femoris 
B)  Innervates muscles of the pelvic floor 
C)  Innervates the muscles that adduct the thigh 
D)  Innervates the anterior and lateral muscles of the leg 
E)  Branches to form the medial and lateral plantar nerves 
A)  Innervates the iliopsoas, sartorius, and quadriceps femoris 
B)  Innervates muscles of the pelvic floor 
C)  Innervates the muscles that adduct the thigh 
D)  Innervates the anterior and lateral muscles of the leg 
E)  Branches to form the medial and lateral plantar nerves

Exam 12: Spinal Cord and Spinal Nerves

Which portion of a reflex arc is most likely to be located entirely within the central nervous system?

Ventral rami of some spinal nerves join with each other to form a ________.

An abnormal patellar reflex indicates damage of the T10 - T12 spinal segments.

-The figure illustrates a cross section of the spinal cord. Which structure is indicated by "A"?

-What does "B" represent?

-The figure illustrates a cross section of the spinal cord. Which structure is indicated by "B"?

Improper use of crutches could cause compression of the ________ nerve.

When someone taps you on your shoulder, they stimulate the ________ nerve.

Muscle spindles

If the ventral root of a spinal nerve were cut, the regions innervated by that spinal nerve would experience complete loss of ________.

Initiating the withdrawal reflex in both legs at the same time would cause one to

The knee-jerk reflex involves which of the following?

Match the nerve or plexus with its appropriate description. -Common fibular nerve

Which of the following nerves is part of the brachial plexus?

The conus medullaris

Intercostal nerves are formed from the

The sac surrounding the spinal cord is the ________.

The branch of a spinal nerve that innervates deep muscles on the dorsal thorax is the ________.

What is found in the lateral gray horns of the spinal cord?

Match the nerve or plexus with its appropriate description. -Femoral nerve

The Human Organism

The Chemical Basis of Life

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joint and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolyte, and Acid-Base Balance

Reproductive System

Development, Growth, Aging, and Genetics

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