Deck 14: The Peripheral Nervous System

Question 1

Figure 14.2
Use the diagram above to answer the following questions.
Which cranial nerve, along with the abducens and oculomotor nerves, has somatic motor fibers that pass through the superior orbital fissure?

A) I
B) II
C) IV
D) VII
E) VIII

Answer 1

C

Question 2

Figure 14.1
Use the diagram above to answer the following questions.
Which letter indicates a bulbous corpuscle (Ruffini ending) that slowly adapts to deep pressure stimuli?

A) A
B) B
C) C
D) D
E) E

Answer 2

E

Question 3

Figure 14.1
Use the diagram above to answer the following questions.
Which letter indicates a lamellar corpuscle (Pacinian corpuscle) that rapidly adapts to deep pressure stimuli?

A) A
B) B
C) C
D) D
E) E

Answer 3

D

Question 4

Figure 14.2
Use the diagram above to answer the following questions.
Which cranial nerve pair, similar to cranial nerve II, runs through a canal that bears the same name?

A) IV
B) V
C) VIII
D) XI
E) XII

Question 5

Figure 14.2
Use the diagram above to answer the following questions.
Of the cranial nerve pairs listed below, which nerve, along with XI and XII, relays only somatic motor impulses?

A) I
B) II
C) IV
D) V
E) VIII

Question 6

Figure 14.2
Use the diagram above to answer the following questions.
Which cranial nerve pair is characterized by somatic sensory fibers crossing at the ventral midline of the brain?

A) I
B) II
C) IV
D) V
E) VIII

Question 7

Figure 14.2
Use the diagram above to answer the following questions.
Damage to which cranial nerve pair can cause difficulties in speech and swallowing?

A) IV
B) V
C) VIII
D) XI
E) XII

Question 8

Figure 14.2
Use the diagram above to answer the following questions.
Which letter indicates the cranial nerve that has three major branches, and is cranial nerve V?

A) A
B) B
C) C
D) D
E) E

Question 9

Figure 14.2
Use the diagram above to answer the following questions.
Which cranial nerve pair, along with cranial nerve III, has fibers that pass through the superior orbital fissure?

A) I
B) II
C) IV
D) VII
E) VIII

Question 10

Figure 14.1
Use the diagram above to answer the following questions.
Which letter indicates receptors that respond chiefly to pain and temperature?

A) A
B) B
C) C
D) D
E) E

Question 11

Figure 14.2
Use the diagram above to answer the following questions.
Which letter indicates the cranial nerve with nerve fibers that pass through the hypoglossal canal?

A) A
B) B
C) C
D) D
E) E

Question 12

Figure 14.2
Use the diagram above to answer the following questions.
Damage to which cranial nerve pair can cause deafness and problems with equilibrium?

A) IV
B) V
C) VIII
D) XI
E) XII

Question 13

Figure 14.1
Use the diagram above to answer the following questions.
Which letter indicates tactile epithelial cells (Merkel discs), light pressure receptors found in the epidermis?

A) A
B) B
C) C
D) D
E) E

Question 14

Figure 14.2
Use the diagram above to answer the following questions.
Which letter indicates the cranial nerve that has motor fibers that innervate muscles of facial expression?

A) A
B) B
C) C
D) D
E) E

Question 15

Figure 14.2
Use the diagram above to answer the following questions.
The spinal root of which cranial nerve pair innervates the sternocleidomastoid and trapezius muscles?

A) IV
B) V
C) VIII
D) XI
E) XII

Question 16

Figure 14.1
Use the diagram above to answer the following questions.
Which letter indicates a tactile corpuscle (Meissner's corpuscle) that is responsive to light pressure?

A) A
B) B
C) C
D) D
E) E

Question 17

Figure 14.2
Use the diagram above to answer the following questions.
Which cranial nerve, along with cranial nerve pair II, relays specific somatic sensory impulses?

A) I
B) II
C) IV
D) V
E) VIII

Question 18

Figure 14.2
Use the diagram above to answer the following questions.
Which letter indicates the cranial nerve that transmits olfactory impulses?

A) A
B) B
C) C
D) D
E) E

Question 19

Figure 14.2
Use the diagram above to answer the following questions.
Which letter indicates the structure where cranial nerve fibers from the retina cross to the opposite side of the brain?

A) A
B) B
C) C
D) D
E) E

Question 20

Figure 14.2
Use the diagram above to answer the following questions.
Which cranial nerve pair has two sensory branches which both pass through the internal acoustic meatus?

A) I
B) II
C) IV
D) V
E) VIII

Question 21

Which spinal nerve relays motor impulses to most of the muscles of the posterior forearm?

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

Question 22

Figure 14.2
Use the diagram above to answer the following questions.
Sensory fibers of which cranial nerve pair pass through the cribriform plate of the ethmoid bone?

A) I
B) II
C) IV
D) V
E) VIII

Question 23

If one likens a spinal nerve to the trunk of a tree, then the two roots of this tree are the dorsal and ventral roots. What would represent the two large branches of this tree?

A) rami communicantes
B) dorsal and ventral root ganglia
C) ventral and dorsal rami
D) the brachial plexus

Question 24

Extrafusal muscle fibers that surround a muscle spindle and resist excessive muscle stretching are innervated by

A) primary sensory endings.
B) secondary sensory endings.
C) α efferent neurons.
D) γ efferent neurons.

Question 25

A pudendal nerve block may be given

A) to treat pain from sciatica.
B) in surgery to halt breathing temporarily.
C) in surgery to relax the muscles that cover the fibula.
D) to a woman giving birth.

Question 26

Of the following, the nerve that forms from fibers of both the medial and lateral cords of the brachial plexus is the

A) median.
B) axillary.
C) ulnar.
D) musculocutaneous.

Question 27

An example of an encapsulated receptor is

A) a hair follicle receptor.
B) a tendon organ.
C) a tactile epithelial cell (Merkel disc).
D) a lamellar corpuscle (Pacinian corpuscle).

Question 28

Which of the cranial nerves listed below provides innervation to one of the extrinsic eye muscles?

A) trigeminal
B) trochlear
C) optic
D) facial

Question 29

Contraction rate of the diaphragm is controlled by which nerve?

A) phrenic
B) vagus
C) trigeminal
D) trochlear

Question 30

Figure 14.2
Use the diagram above to answer the following questions.
Which of the cranial nerve listed below is the largest in diameter?

A) IV
B) V
C) VIII
D) XI
E) XII

Question 31

Figure 14.2
Use the diagram above to answer the following questions.
Damage to which cranial nerve pair may result in anosmia?

A) I
B) II
C) IV
D) V
E) VIII

Question 32

The tibial and common fibular nerves branch from the ________ nerve.

A) sciatic
B) pudendal
C) axillary
D) femoral

Question 33

Figure 14.2
Use the diagram above to answer the following questions.
Which cranial nerve pair along with the vagus and glossopharyngeal nerves, exits through the jugular foramen?

A) IV
B) V
C) VIII
D) XI
E) XII

Question 34

Anesthetic injection to which nerve may block pain during childbirth?

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

Question 35

A receptor that monitors stretch of the patellar tendon can be classified as a

A) mechanoreceptor and interoceptor.
B) mechanoreceptor and proprioceptor.
C) nociceptor and exteroceptor.
D) baroreceptor and proprioceptor.

Question 36

Figure 14.2
Use the diagram above to answer the following questions.
Which cranial nerve pair has three major branches, the maxillary, mandibular, and ophthalmic divisions?

A) IV
B) V
C) VIII
D) XI
E) XII

Question 37

A lesion to the common fibular nerve causes

A) footdrop.
B) paralysis of the peroneal muscles.
C) hammer toe.
D) the same deficit as a ruptured calcaneal tendon causes.

Question 38

Sensory impulses from the skin would be transmitted into the spinal cord on the

A) ventral root of spinal nerves.
B) dorsal root of spinal nerves.
C) sympathetic nerve pathway.
D) pathway of parasympathetic neurons.

Question 39

A receptor that monitors stretch of the stomach can be classified as a

A) mechanoreceptor and interoceptor.
B) mechanoreceptor and proprioceptor.
C) nociceptor and exteroceptor.
D) baroreceptor and proprioceptor.

Question 40

The major nerve plexus to the upper limbs is the

A) brachial plexus.
B) sacral plexus.
C) cervical plexus.
D) lumbar plexus.

Question 41

Spinal nerves are

A) present in 31 pairs.
B) located exclusively in the vertebral canal.
C) present only in the thoracic region where plexuses are absent.
D) purely sensory nerves.

Question 42

Which of these foramen does not include a branch of the trigeminal nerve?

A) mandibular
B) ovale
C) rotundum
D) spinosum

Question 43

The primary nerve to muscles of the anterior thigh is the

A) sciatic.
B) obturator.
C) sural.
D) femoral.

Question 44

What specific dermatome lies at the level of the navel?

A) C₂
B) S₄
C) T₁₀
D) T₁

Question 45

Which of these receptors would not be found within a synovial joint capsule?

A) free nerve endings
B) tactile corpuscles (Meissner's corpuscles)
C) lamellar corpuscles (Pacinian corpuscles)
D) bulbous corpuscles (Ruffini endings)

Question 46

Spinal nerves found at the level of L₄ to about S₄ form the

A) lumbar plexus.
B) femoral plexus.
C) sacral plexus.
D) thoracic plexus.

Question 47

To avoid double vision, which of the following groups of cranial nerves must be functioning correctly?

A) I, IX, and X
B) VII, VIII, and XII
C) V, XI, and XII
D) III, IV, and VI

Question 48

Which cranial nerves have fibers that relay somatic motor impulses to pharyngeal muscles during swallowing?

A) I and II
B) V and XII
C) VI and VII
D) IX and X

Question 49

Which of these nerves does not arise primarily from the brachial plexus?

A) median
B) phrenic
C) radial
D) ulnar

Question 50

The gastrocnemius muscle is innervated by the ________ nerve.

A) obturator
B) common peroneal
C) tibial
D) femoral

Question 51

An injury to the ulnar nerve causes

A) claw hand.
B) inability to oppose the thumb.
C) the "hand of benediction."
D) wrist drop.

Question 52

Which of the following regions is not innervated by nerves of the sacral plexus (L₄ - S₄)?

A) posterior thigh
B) anterior thigh muscles
C) foot
D) external genitalia

Question 53

The cranial nerves that have neural connections with the tongue include all of the following except the

A) trigeminal.
B) facial.
C) glossopharyngeal.
D) accessory.

Question 54

The abducens nerve (CN VI)

A) innervates the lateral rectus muscle of the eye.
B) relays sensory information from the taste buds on the tongue.
C) exits from the medulla.
D) if paralyzed, results in Bell's palsy.

Question 55

Which of these cranial nerve pairs do not pass through the superior orbital fissures?

A) abducens
B) oculomotor
C) optic
D) trochlear

Question 56

Mixed cranial nerves containing both motor and sensory fibers include all of the following except the

A) facial.
B) optic.
C) trigeminal.
D) vagus.

Question 57

The trigeminal nerve contains which class(es) of nerve fibers?

A) somatic sensory only
B) somatic motor and general somatic sensory
C) somatic sensory, visceral sensory, and visceral motor
D) somatic motor only

Question 58

A person who cannot blink or smile could have damage to which cranial nerve?

A) I
B) III
C) V
D) VII

Question 59

Which of the cranial nerves listed below is a special somatic sensory nerve?

A) facial
B) vestibulocochlear
C) accessory
D) trochlear

Question 60

What is the only cranial nerve that has fibers that enter and leave the skull through different foramen? (Hint: It enters through the foramen magnum and leaves through the jugular foramen.)

A) VI
B) XII
C) XI
D) I

Question 61

Both the parasympathetic and sympathetic divisions are part of the somatic motor nervous division.

Question 62

Which of these nerves arises from the posterior cord of the brachial plexus?

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

Question 63

The only cranial nerve that travels into the abdomen is the

A) vagus.
B) hypoglossal.
C) glossopharyngeal.
D) vestibulocochlear.

Question 64

The cranial nerve pair with large branches that passes through the foramen ovale of the skull is

A) I.
B) III.
C) V.
D) VII.

Question 65

The muscles that initiate flexion at the elbow joint (biceps brachii and brachialis) are innervated by what nerve from the lateral cord?

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

Question 66

All of the following are exteroceptors: tactile corpuscles, lamellar corpuscles, and tactile epithelial cells.

Question 67

Migraine headaches result when cerebral arteries dilate in response to neurotransmitters released from the

A) abducens nerve.
B) facial nerve.
C) trigeminal nerve.
D) vestibulocochlear nerve.

Question 68

The phrenic nerve receives fibers from

A) C₃-C₅.
B) T₁-T₇.
C) CN X.
D) CN XI.

Question 69

A lesion/injury to the radial nerve causes

A) footdrop.
B) claw hand.
C) the "hand of benediction."
D) wrist-drop.

Question 70

Tactile corpuscles (Meissner's corpuscles)

A) occur in hairy skin.
B) occur in dermal papillae.
C) are nociceptors.
D) are free unencapsulated dendritic endings.

Question 71

Motor neurons to skeletal muscle belong to the

A) somatic division of the nervous system.
B) autonomic nervous system.
C) afferent division of the autonomic nervous system.
D) visceral division of the nervous system.

Question 72

Disorders of balance may follow trauma to which nerve?

A) abducens
B) vestibulocochlear
C) trigeminal
D) accessory

Question 73

Which of these statements about intercostal nerves is true?

A) They are part of a nerve plexus.
B) They innervate only the intercostal muscles.
C) The ventral rami of T₁-T₁₂ spinal nerves lie just inferior to each rib.
D) They consist of 12 pairs.

Question 74

When you contract your Biceps brachii muscle, you are utilizing the somatic sensory portion of the nervous system.

Question 75

Which cranial nerve pair is comprised of ventral rootlets from C₁-C₅?

A) abducens
B) accessory
C) glossopharyngeal
D) hypoglossal

Question 76

All of the special senses taste, smell, vision, hearing, and equilibrium are part of the afferent division of the peripheral nervous system.

Question 77

Starting at the spinal cord and proceeding distally, the subdivisions of the brachial plexus are

A) rami, trunks, divisions, cords.
B) rami, divisions, cords, trunks.
C) divisions, rami, trunks, cords.
D) trunks, divisions, cords, rami.

Question 78

The lateral cord of the brachial plexus forms directly from

A) the upper, middle, and lower trunks.
B) the posterior divisions of the middle and lower trunks.
C) the anterior divisions of the upper and middle trunks.
D) roots C₇-T₁.

Question 79

Which nerve does not arise from the anterior division of the brachial plexus?

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

Question 80

Exteroceptors process information from visceral organs.