Question 1

Gamma motor neurons

Accepted Answer

A)  are located in tendons. 
B)  transmit action potentials to skeletal muscle. 
C)  regulate the sensitivity of the muscle spindle. 
D)  enable the brain to perceive that a muscle has been stretched. 
E)  innervate the whole muscle. 
A)  are located in tendons. 
B)  transmit action potentials to skeletal muscle. 
C)  regulate the sensitivity of the muscle spindle. 
D)  enable the brain to perceive that a muscle has been stretched. 
E)  innervate the whole muscle. C

Question 2

When a person sits on a hard surface for a period of time, his foot or leg may "go to sleep." This sensation is the result of compressing the _____ nerve.

Accepted Answer

A)  femoral 
B)  sciatic 
C)  obturator 
D)  pudendal 
E)  ulnar 
A)  femoral 
B)  sciatic 
C)  obturator 
D)  pudendal 
E)  ulnar B

Question 3

The patellar or knee-jerk reflex is a classic example of

Accepted Answer

A)  the Golgi tendon reflex. 
B)  the withdrawal reflex. 
C)  the stretch reflex. 
D)  the crossed extensor reflex. 
E)  reciprocal innervation. 
A)  the Golgi tendon reflex. 
B)  the withdrawal reflex. 
C)  the stretch reflex. 
D)  the crossed extensor reflex. 
E)  reciprocal innervation. C

Question 4

The cutaneous sensory distribution of a spinal nerve can be mapped as a

Accepted Answer

A)  dermatome. 
B)  plexitome. 
C)  microtome. 
D)  myotome. 
E)  superdome. 
A)  dermatome. 
B)  plexitome. 
C)  microtome. 
D)  myotome. 
E)  superdome.

Question 5

A man was in an accident and severed his spinal cord between C6 and C7. Which of the following would NOT occur?

Accepted Answer

A)  loss of sensation in the trunk below the shoulders, the lower limbs and portions of the arms 
B)  loss of use of the phrenic nerves and paralysis of the diaphragm 
C)  loss of movement in the lower limbs 
D)  loss of the use of the intercostals nerves, and breathing would be affected because the intercostals muscles would be paralyzed 
E)  loss of sensation and movement in the jaw 
A)  loss of sensation in the trunk below the shoulders, the lower limbs and portions of the arms 
B)  loss of use of the phrenic nerves and paralysis of the diaphragm 
C)  loss of movement in the lower limbs 
D)  loss of the use of the intercostals nerves, and breathing would be affected because the intercostals muscles would be paralyzed 
E)  loss of sensation and movement in the jaw

Question 6

Which of the following statements concerning the structure of spinal nerves is true?

Accepted Answer

A)  The ventral root contains motor or efferent fibers. 
B)  The ventral root has a prominent root ganglion. 
C)  Rootlets from the surface of the spinal cord form the dorsal and ventral rami. 
D)  Each spinal nerve is formed by the union of a cranial nerve and a spinal nerve. 
E)  Spinal nerves do not have specific cutaneous distributions. 
A)  The ventral root contains motor or efferent fibers. 
B)  The ventral root has a prominent root ganglion. 
C)  Rootlets from the surface of the spinal cord form the dorsal and ventral rami. 
D)  Each spinal nerve is formed by the union of a cranial nerve and a spinal nerve. 
E)  Spinal nerves do not have specific cutaneous distributions.

Question 7

If a person fell down the steps and then developed pain down his anterior thigh into the knee, which of the following spinal nerves was probably damaged?

Accepted Answer

A)  obturator 
B)  femoral 
C)  tibial 
D)  common fibular (peroneal) 
E)  pudendal 
A)  obturator 
B)  femoral 
C)  tibial 
D)  common fibular (peroneal) 
E)  pudendal

Question 8

Match the disorder with its description.
-neuritis

Accepted Answer

A) pain radiating down the back of the thigh and leg 
B) stiffness in the neck and headache 
C) inflammation of a nerve 
D) pain along a nerve tract 
E) loss of sensation 
A) pain radiating down the back of the thigh and leg 
B) stiffness in the neck and headache 
C) inflammation of a nerve 
D) pain along a nerve tract 
E) loss of sensation

Question 9

Match the nerve to the correct function.
-radial nerve

Accepted Answer

A) provides motor innervation to the biceps brachii 
B) innervates two forearm muscles plus most of the intrinsic hand muscles 
C) innervates all but one of the flexor muscles of the forearm and most of the hand muscles near the thumb 
D) innervates the deltoid and teres minor muscles 
E) innervates the triceps brachii 
A) provides motor innervation to the biceps brachii 
B) innervates two forearm muscles plus most of the intrinsic hand muscles 
C) innervates all but one of the flexor muscles of the forearm and most of the hand muscles near the thumb 
D) innervates the deltoid and teres minor muscles 
E) innervates the triceps brachii

Question 10

What structure makes the dorsal root different from the ventral root?

Accepted Answer

A)  The dorsal root has a ganglion. 
B)  The dorsal root has a tract. 
C)  The dorsal root has a nucleus. 
D)  The dorsal root appears the same as the ventral root. 
A)  The dorsal root has a ganglion. 
B)  The dorsal root has a tract. 
C)  The dorsal root has a nucleus. 
D)  The dorsal root appears the same as the ventral root.

Question 11

Match the nerve to the correct function.
-musculocutaneous nerve

Accepted Answer

A) provides motor innervation to the biceps brachii 
B) innervates two forearm muscles plus most of the intrinsic hand muscles 
C) innervates all but one of the flexor muscles of the forearm and most of the hand muscles near the thumb 
D) innervates the deltoid and teres minor muscles 
E) innervates the triceps brachii 
A) provides motor innervation to the biceps brachii 
B) innervates two forearm muscles plus most of the intrinsic hand muscles 
C) innervates all but one of the flexor muscles of the forearm and most of the hand muscles near the thumb 
D) innervates the deltoid and teres minor muscles 
E) innervates the triceps brachii

Question 12

What is found in the dorsal root ganglion?

Accepted Answer

A)  The cell bodies of multipolar motor neurons. 
B)  The cell bodies of pseudo-unipolar sensory neurons. 
C)  The cell bodies of multipolar interneurons. 
D)  The cell bodies of bipolar sensory neurons. 
A)  The cell bodies of multipolar motor neurons. 
B)  The cell bodies of pseudo-unipolar sensory neurons. 
C)  The cell bodies of multipolar interneurons. 
D)  The cell bodies of bipolar sensory neurons.

Question 13

What structure anchors the thecal sac and conus medullaris to the coccyx?

Accepted Answer

A)  filum terminale 
B)  denticulate ligaments 
C)  pia mater 
D)  cauda equina 
A)  filum terminale 
B)  denticulate ligaments 
C)  pia mater 
D)  cauda equina

Question 14

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 15

The endoneurium

Accepted Answer

A)  surrounds nerve cell bodies. 
B)  surrounds individual axons and their Schwann cells. 
C)  bundles axons into fascicles. 
D)  bundles fascicles into nerves. 
E)  surrounds nerve tracts in the spinal cord. 
A)  surrounds nerve cell bodies. 
B)  surrounds individual axons and their Schwann cells. 
C)  bundles axons into fascicles. 
D)  bundles fascicles into nerves. 
E)  surrounds nerve tracts in the spinal cord.

Question 16

Match the nerve with the appropriate description.
-associated with withdrawal and stretch reflex

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 17

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 18

Match the nerve with the 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 19

Which of the following nerves is associated with the lumbosacral plexus?

Accepted Answer

A)  phrenic 
B)  median 
C)  musculocutaneous 
D)  ulnar 
E)  obturator 
A)  phrenic 
B)  median 
C)  musculocutaneous 
D)  ulnar 
E)  obturator

Question 20

The spinal cord begins at the

Accepted Answer

A)  cerebellum. 
B)  medulla oblongata. 
C)  foramen magnum. 
D)  conus medullaris 
E)  1st cervical vertebrae. 
A)  cerebellum. 
B)  medulla oblongata. 
C)  foramen magnum. 
D)  conus medullaris 
E)  1st cervical vertebrae.

Exam 12: Spinal Cord and Spinal Nerves

Gamma motor neurons

When a person sits on a hard surface for a period of time, his foot or leg may "go to sleep." This sensation is the result of compressing the _____ nerve.

The patellar or knee-jerk reflex is a classic example of

The cutaneous sensory distribution of a spinal nerve can be mapped as a

A man was in an accident and severed his spinal cord between C6 and C7. Which of the following would NOT occur?

Which of the following statements concerning the structure of spinal nerves is true?

If a person fell down the steps and then developed pain down his anterior thigh into the knee, which of the following spinal nerves was probably damaged?

Match the disorder with its description. -neuritis

Match the nerve to the correct function. -radial nerve

What structure makes the dorsal root different from the ventral root?

Match the nerve to the correct function. -musculocutaneous nerve

What is found in the dorsal root ganglion?

What structure anchors the thecal sac and conus medullaris to the coccyx?

Intercostal nerves are formed from the

The endoneurium

Match the nerve with the appropriate description. -associated with withdrawal and stretch reflex

The conus medullaris

Match the nerve with the appropriate description. -common fibular nerve

Which of the following nerves is associated with the lumbosacral plexus?

The spinal cord begins at the

The Human Organism

The Chemical Basis of Life

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints 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, Electrolytes, and Acidbase Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters