Chapter 14 The Peripheral Nervous System

70) The phrenic nerve receives fibers from A) C3-C5. B) T1-T7. C) CN X. D) CN XI.

A) C3-C5.

24) 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

A) I

25) Damage to which cranial nerve pair may result in anosmia? A) I B) II C) IV D) V E) VIII

A) I

37) The major nerve plexus to the upper limbs is the A) brachial plexus. B) sacral plexus. C) cervical plexus. D) lumbar plexus.

A) brachial plexus.

53) An injury to the ulnar nerve causes A) claw hand. B) inability to oppose the thumb. C) the "hand of benediction." D) wrist drop.

A) claw hand.

27) 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.

A) footdrop.

52) 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.

A) innervates the lateral rectus muscle of the eye.

31) 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.

A) mechanoreceptor and interoceptor.

39) 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.

A) median.

38) Contraction rate of the diaphragm is controlled by which nerve? A) phrenic B) vagus C) trigeminal D) trochlear

A) phrenic

54) 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.

A) present in 31 pairs.

75) 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.

A) rami, trunks, divisions, cords.

33) The tibial and common fibular nerves branch from the ________ nerve. A) sciatic B) pudendal C) axillary D) femoral

A) sciatic

73) 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.

A) somatic division of the nervous system.

71) The only cranial nerve that travels into the abdomen is the A) vagus. B) hypoglossal. C) glossopharyngeal. D) vestibulocochlear.

A) vagus.

15) 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

B) II

21) Which cranial nerve pair has three major branches, the maxillary, mandibular, and ophthalmic divisions? A) IV B) V C) VIII D) XI E) XII

B) V

22) Which of the cranial nerve listed below is the largest in diameter? A) IV B) V C) VIII D) XI E) XII

B) V

62) Which cranial nerve pair is comprised of ventral rootlets from C1-C5? A) abducens B) accessory C) glossopharyngeal D) hypoglossal

B) accessory

49) 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

B) anterior thigh muscles

29) 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.

B) dorsal root of spinal nerves.

30) 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.

B) mechanoreceptor and proprioceptor.

61) Tactile corpuscles (Meissner's corpuscles) A) occur in hairy skin. B) occur in dermal papillae. C) are nociceptors. D) are free unencapsulated dendritic endings.

B) occur in dermal papillae.

45) Mixed cranial nerves containing both motor and sensory fibers include all of the following except the A) facial. B) optic. C) trigeminal. D) vagus.

B) optic.

47) Which of these nerves does not arise primarily from the brachial plexus? A) median B) phrenic C) radial D) ulnar

B) phrenic

56) 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

B) somatic motor and general somatic sensory

44) 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)

B) tactile corpuscles (Meissner's corpuscles)

36) Which of the cranial nerves listed below provides innervation to one of the extrinsic eye muscles? A) trigeminal B) trochlear C) optic D) facial

B) trochlear

42) Which of the cranial nerves listed below is a special somatic sensory nerve? A) facial B) vestibulocochlear C) accessory D) trochlear

B) vestibulocochlear

74) Disorders of balance may follow trauma to which nerve? A) abducens B) vestibulocochlear C) trigeminal D) accessory

B) vestibulocochlear

12) 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

C) IV

14) 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

C) IV

16) 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

C) IV

60) What specific dermatome lies at the level of the navel? A) C2 B) S4 C) T10 D) T1

C) T10

64) 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.

C) The ventral rami of T1-T12 spinal nerves lie just inferior to each rib.

68) 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.

C) V.

20) Damage to which cranial nerve pair can cause deafness and problems with equilibrium? A) IV B) V C) VIII D) XI E) XII

C) VIII

41) 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

C) XI

50) Which of these cranial nerve pairs do not pass through the superior orbital fissures? A) abducens B) oculomotor C) optic D) trochlear

C) optic

35) Anesthetic injection to which nerve may block pain during childbirth? A) sciatic B) femoral C) pudendal D) obturator

C) pudendal

63) Which of these nerves arises from the posterior cord of the brachial plexus? A) median B) musculocutaneous C) radial D) ulnar

C) radial

66) Which nerve does not arise from the anterior division of the brachial plexus? A) median B) musculocutaneous C) radial D) ulnar

C) radial

51) 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.

C) sacral plexus.

65) 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.

C) the anterior divisions of the upper and middle trunks.

48) The gastrocnemius muscle is innervated by the ________ nerve. A) obturator B) common peroneal C) tibial D) femoral

C) tibial

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.

C) trigeminal nerve.

34) 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

C) ventral and dorsal rami

40) 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.

C) α efferent neurons.

59) 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

D) III, IV, and VI

43) 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

D) IX and X

55) A person who cannot blink or smile could have damage to which cranial nerve? A) I B) III C) V D) VII

D) VII

19) The spinal root of which cranial nerve pair innervates the sternocleidomastoid and trapezius muscles? A) IV B) V C) VIII D) XI E) XII

D) XI

23) 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

D) XI

26) 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).

D) a lamellar corpuscle (Pacinian corpuscle).

46) 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.

D) accessory.

57) The primary nerve to muscles of the anterior thigh is the A) sciatic. B) obturator. C) sural. D) femoral.

D) femoral.

72) 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

D) musculocutaneous

32) Which spinal nerve relays motor impulses to most of the muscles of the posterior forearm? A) ulnar B) median C) axillary D) radial

D) radial

58) Which of these foramen does not include a branch of the trigeminal nerve? A) mandibular B) ovale C) rotundum D) spinosum

D) spinosum

28) 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.

D) to a woman giving birth.

69) A lesion/injury to the radial nerve causes A) footdrop. B) claw hand. C) the "hand of benediction." D) wrist-drop.

D) wrist-drop.

11) Which cranial nerve, along with cranial nerve pair II, relays specific somatic sensory impulses? A) I B) II C) IV D) V E) VIII

E) VIII

13) 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

E) VIII

17) 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

E) XII

18) Damage to which cranial nerve pair can cause difficulties in speech and swallowing? A) IV B) V C) VIII D) XI E) XII

E) XII