Figure 13.2
Using Figure 13.2, identify the following components of the reflex arc:
64)
Sensory neuron.
64)
65)
List and describe the functions of the three cranial nerves that serve the muscles of the eye.
65)
66)
Distinguish between monosynaptic and polysynaptic reflexes and between ipsilateral and
contralateral reflex responses.
66)
67)
Name an exteroceptor that is not a cutaneous receptor and explain why it is called an
exteroceptor.
67)
68)
Define tendon organs and muscle spindles relative to the stretch reflex.
68)
Figure 13.3
Using Figure 13.3, match the following:
69)
All but T2T12 branch and form nerve plexuses.
69)
70)
Name three unencapsulated sensory receptors and tell what they are used for.
70)
Figure 13.3
Using Figure 13.3, match the following:
71)
Supplies all of the body except the posterior.
71)
72)
Supplies the posterior body trunk.
72)
73)
The facial nerve is cranial nerve number ________.
73)
Figure 13.1
Using Figure 13.1, match the following:
74)
Innervates the superior oblique muscle.
74)
75)
The ________ nerve is the largest of the cranial nerves.
75)
76)
The perineurium defines the boundary of a ________.
76)
Figure 13.2
Using Figure 13.2, identify the following components of the reflex arc:
77)
Effector.
77)
TRUE/FALSE. Write ‘T’ if the statement is true and ‘F’ if the statement is false.
78)
The glossopharyngeal nerve is the only cranial nerve that contains sensory fibers.
79)
The dorsal ramus consists only of motor fibers bringing information to the spinal cord.
80)
Dorsal and ventral rami are similar in that they both contain sensory and motor fibers.
81)
External strabismus and ptosis could be caused by damage to the oculomotor nerve.
82)
Pacinian corpuscles can be exteroceptors, interoceptors, or proprioceptor,
83)
Reciprocal inhibition means that while one sensory nerve is stimulated, another sensory neuron for
synergistic muscles in the same area is inhibited and cannot respond.
84)
The musculocutaneous nerve is a major nerve of the brachial plexus.
85)
Dermatomes are skin segments that relate to sensory innervation regions of the spinal nerves.
B
86)
The meningeal branch of a spinal nerve actually reenters the vertebral canal to innervate the
meninges and blood vessels.
87)
Irritation of the phrenic nerve may cause diaphragm spasms called hiccups.
88)
The only cranial nerves to extend beyond the head and neck region are the vagus nerves.
89)
The cerebellum and basal nuclei are involved in regulating motor activity, starting
and stopping movements, and coordinating postural movements.
90)
The obturator nerve branches from the sacral plexus.
91)
In the somatosensory system there are no third–order neurons in the cerebellum.
92)
The second cranial nerve forms a chiasma at the base of the brain for partial crossover of neural
fibers.
MATCHING. Choose the item in column 2 that best matches each item in column 1.
Match the following reflexes to their function:
93)
Prevents muscle overstretching and
maintains muscle tone.
A
A)
Stretch
Match the following:
94)
Controls the outputs of the cortex and
regulates motor activity.
A
95)
Includes cortical and brain stem motor
areas.
B
A)
Precommand level
Match the following:
96)
Bulbous corpuscle
A)
Ruffini endings
Match the following reflexes to their function:
97)
Produces muscle relaxation and
lengthening in response to tension; the
contracting muscle relaxes as its
antagonist is activated.
A)
Tendon
Match the following:
98)
The cerebellum and basal nuclei.
A)
Precommand level
Match the following reflexes to their function:
99)
Tests both upper and lower motor
pathways. The sole of the foot is
stimulated with a dull instrument.
A)
Plantar
Match the following:
100)
Striking the “funny bone” (ulnar
nerve) may cause injury to a nerve of
this plexus.
101)
Trauma to a nerve of this plexus may
cause wrist drop.
102)
The obturator and femoral nerves
branch from this plexus.
103)
A fall or improper administration of
an injection to the buttocks may injure
a nerve of this plexus.
A)
Sacral plexus
B)
Brachial plexus
100)
101)
102)
103)
Match the following reflexes to their function:
104)
Produces a rapid withdrawal of the
body part from a painful stimulus;
ipsilateral.
105)
Consists of an ipsilateral withdrawal
reflex and a contralateral extensor
reflex; important in maintaining
balance.
A)
Flexor
B)
Crossed–extensor
104)
105)
Match the following:
106)
Tactile corpuscle
A)
Meissner corpuscle
106)
Match the following:
107)
Receptors located in epithelium of the
nasal cavity.
B)
108)
Helps to regulate blood pressure and
digestion.
A)
Vagus
107)
108)
Match the following:
109)
The phrenic nerve branches from this
plexus.
A)
Cervical plexus
109)
Match the following:
110)
Intermediate relay for incoming and
outgoing neurons.
A)
Projection level
110)
Match the following:
111)
Lamellar corpuscle
111)
A)
Pacinian corpuscle
Match the following:
112)
Serves the senses of hearing and
equilibrium.
A)
Vestibulocochlear
112)
113)
Formed by the union of a cranial and a
spinal root.
A)
Accessory
113)
Match the following:
114)
The neural machinery of the spinal
cord, including spinal cord circuits.
115)
Central pattern generators.
115)
A)
Segmental level
114)
Match the following:
116)
Turns the eyeball laterally.
116)
A)
Abducens
ESSAY. Write your answer in the space provided or on a separate sheet of paper.
117)
Good friends Sami and Sara were picking roses when both encountered rose thorns. Sami just laughed and
continued to pick more roses. Sara, however, had tears in her eyes and complained of how much the thorn prick
hurt. What accounts for the difference in their response to the same pain stimulus?
118)
Ralph sustained a leg injury in a bowling accident and had to use crutches. Unfortunately, he never took the
time to learn how to use them properly. After two weeks of use, he noticed his fingers were becoming numb.
Then he noticed his arms were getting weaker and tingling. What could be his problem?
119)
David, an aspiring baseball player, was struck on the left side of his face with a fastball pitch. He was not
wearing a safety helmet. His zygomatic arch was crushed, as well as parts of the temporal bone. Following the
accident and reconstructive surgery, he noted that his left lower eyelid was still drooping and the corner of his
mouth sagged. What nerve damage did he sustain?
120)
A nurse is asked about the cause of the excruciating pain of tic douloureux. How should s/he answer?
121)
A patient suffers nerve damage to the median nerve, requiring surgery to suture the nerve back together. After
surgery, the patient reports that sensation from the lateral and medial sides of the index finger seem to be
reversed. How could this happen?
Answer Key
Testname: C13
Answer Key
Testname: C13
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Answer Key
Testname: C13
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Answer Key
Testname: C13
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