Deck 13: The Peripheral Nervous System and Reflex Activity

Question 1

The nerve is not a branch of the trigeminal nerve.

A) mandibular
B) maxillary
C) cervical
D) ophthalmic

Answer 1

C

Question 2

Nerves that carry impulses toward the CNS only are .

A) mixed nerves
B) efferent nerves
C) afferent nerves
D) motor nerves

Answer 2

C

Question 3

The sciatic nerve is a combination of which two nerves?

A) pudendal and posterior femoral cutaneous
B) common fibular and tibial
C) posterior femoral cutaneous and tibial
D) pudendal and common fibular

Answer 3

B

Question 4

All processing at the circuit level going up to the perceptual level must synapse in the _.

A) pons
B) reticular formation
C) medulla
D) thalamus

Question 5

If the ventral root of a spinal nerve were cut, what would be the result in the tissue or region that nerve supplies?

A) a complete loss of sensation and movement
B) a complete loss of voluntary movement
C) complete loss of sensation
D) loss of neither sensation nor movement but only of autonomic control

Question 6

A fall or an improperly delivered gluteal injection could result in .

A) sciatica
B) neurofibromatosis
C) phantom limb pain
D) postpoliomyelitis muscular atrophy

Question 7

A reflex that causes muscle relaxation and lengthening in response to muscle tension is called a
)

A) flexor reflex
B) crossed- extensor reflex
C) plantar reflex
D) tendon reflex

Question 8

Potentially damaging stimuli that result in pain are selectively detected by .

A) proprioceptors
B) photoreceptors
C) interoceptors
D) nociceptors

Question 9

The cranial nerve with a cervical origin (spinal cord) is the _.

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

Question 10

Which of the following is not a way that sensory receptors are classified?

A) sensitivity to a stimulus
B) type of stimulus detected
C) structural complexity
D) location in the body

Question 11

Which of the following is not an aspect of sensory perception?

A) magnitude estimation
B) pattern recognition
C) spatial discrimination
D) feature abstraction
E) visceral identification

Question 12

Select the correct definition.

A) Magnitude estimation is the simplest level of sensation.
B) Pattern recognition allows us to see a familiar face.
C) Perceptual detection is the ability to detect how much stimulus is applied to the body.
D) Spatial discrimination allows us to recognize textures.

Question 13

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

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

Question 14

Bell's palsy is .

A) characterized by partial paralysis of diaphragm muscles
B) characterized by paralysis of facial muscles
C) characterized by loss of vision
D) often caused by inflammation of the trigeminal nerve

Question 15

Which receptors adapt most slowly?

A) smell receptors
B) touch receptors
C) nociceptors
D) pressure receptors

Question 16

Spinal nerves exiting the cord from the level of L4 to S4 form the .

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

Question 17

Which nerve is compressed in carpal tunnel syndrome?

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

Question 18

The posterior side of the thigh, leg, and foot is served by the nerve.

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

Question 19

Which of the following nerves does not arise from the brachial plexus?

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

Question 20

Feeling a gentle caress on your arm would likely involve all of the following except .

A) tactile discs
B) Meissner's corpuscles
C) Pacinian corpuscles
D) hair follicle receptors

Question 21

Problems in balance may follow trauma to which nerve?

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

Question 22

Select the statement that is most correct.

A) Ganglia are collections of neuron cell bodies in the spinal cord that are associated with efferent fibers.
B) The dorsal root ganglion is a motor- only structure.
C) Ganglia associated with afferent nerve fibers contain cell bodies of sensory neurons.
D) The cell bodies of afferent ganglia are located in the spinal cord.

Question 23

Figure 13.3Using Figure 13.3, match the following:
Supplies each muscle with fibers from more than one nerve.

Question 24

The patellar "knee jerk" reflex is an example of a(n) .

A) stress reflex
B) crossed- extensor reflex
C) stretch reflex
D) extensor thrust reflex

Question 25

Striking the "funny bone" is actually stimulation of (or injury to) the .

A) median nerve
B) ulnar nerve
C) radial nerve
D) sciatic nerve

Question 26

A patient who received a blow to the side of the skull exhibits the following signs and symptoms on that side of the face: he is unable to close his eye, and the corner of his mouth droops. Which cranial nerve has been damaged?

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

Question 27

After axonal injury, regeneration in peripheral nerves is guided by .

A) Schwann cells
B) dendrites
C) Wallerian cells
D) Golgi organs

Question 28

Which of the following is an incorrect statement regarding the occurrence of a sensation?

A) The stimulus energy must occur within the receptor's receptive field.
B) The stimulus energy must be converted into the energy of a graded potential called a transduction potential.
C) A generator potential in the associated sensory neuron must reach threshold.
D) The stimulus energy must match the specificity of the receptor.

Question 29

Inborn or intrinsic reflexes are .

A) rapid, predictable, and can be learned responses
B) autonomic only
C) involuntary, yet may be modified by learned behavior
D) always mediated by the brain

Question 30

Which of the following is not a main level of neural integration in the somatosensory system?

A) circuit
B) segmental
C) receptor
D) perceptual

Question 31

Transduction refers to conversion of .

A) stimulus energy into energy of a graded potential
B) receptor energy to stimulus energy
C) afferent impulses to efferent impulses
D) presynaptic nerve impulses to postsynaptic nerve impulses

Question 32

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

A) olfactory
B) trigeminal
C) oculomotor
D) facial

Question 33

Which of the following is the correct simple spinal reflex arc?

A) receptor, efferent neuron, integration center, afferent neuron, effector
B) receptor, afferent neuron, integration center, efferent neuron, effector
C) effector, afferent neuron, integration center, efferent neuron, receptor
D) effector, efferent neuron, integration center, afferent neuron, receptor

Question 34

In a crossed- extensor reflex, if the right arm was grabbed it would flex and the left arm would
)

A) extend
B) adduct
C) abduct
D) also flex

Question 35

Regeneration within the CNS _ _.

A) is more successful than with the PNS
B) typically allows axonal sprouting of 20 mm
C) is promoted by growth inhibitors and glial scars
D) is prevented due to growth- inhibiting proteins of oligodendrocytes

Question 36

A major nerve of the lumbar plexus is the .

A) ilioinguinal
B) sciatic
C) femoral
D) iliohypogastric

Question 37

Starting at the spinal cord, the subdivisions of the brachial plexus are (in order):

A) roots, divisions, cords, and trunks
B) divisions, roots, trunks, and cords
C) trunks, divisions, cords, and roots
D) roots, trunks, divisions, and cords

Question 38

A fracture of the ethmoid bone could result in damage to which cranial nerve?

A) vagus
B) accessory
C) glossopharyngeal
D) olfactory

Question 39

The flexor muscles in the anterior arm (biceps brachii and brachialis) are innervated by what nerve?

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

Question 40

Pressure, pain, and temperature receptors in the skin are .

A) proprioceptors
B) exteroceptors
C) mechanoreceptors
D) interoceptors

Question 41

Figure 13.1Using Figure 13.1, match the following:
Receptor.

Question 42

Figure 13.3Using Figure 13.3, match the following:
Integration center.

Question 43

Figure 13.1Using Figure 13.1, match the following:
Involved in movement of the digestive tract.

Question 44

Figure 13.1Using Figure 13.1, match the following:
Damage to this nerve would cause dizziness, nausea, and loss of balance.

Question 45

Figure 13.3Using Figure 13.3, match the following:
When we hear a strange sound in a room, which aspect of sensory perception is activated?

Question 46

Figure 13.1Using Figure 13.1, match the following:
The primary receptor for pain stimuli is the _ .

Question 47

The highest level of motor control involves the basal nuclei and the .

Question 48

How is a receptor potential similar to an excitatory postsynaptic potential (EPSP) generated at a synapse?

Question 49

Figure 13.1Using Figure 13.1, match the following:
Damage to this nerve would keep the eye from rotating inferolaterally.

Question 50

What is the normal response of the plantar reflex? What is Babinski's sign and what does it indicate?

Question 51

is the tingling sensation when blood has been cut off from an area, as when the foot "goes to sleep."

Question 52

Figure 13.3Using Figure 13.3, match the following:
Contain autonomic nerve fibers.

Question 53

Figure 13.3Using Figure 13.3, match the following:
How does accommodation of muscle spindles figure in the importance of stretch routines as a warm- up for exercise?

Question 54

Speculate about the benefit of having the nerve supply of the diaphragm, which is located in the thoracic- lumbar area of the spinal cord, arise from cervical nerves.

Question 55

Figure 13.3Using Figure 13.3, match the following:
Motor neuron.

Question 56

Figure 13.1Using Figure 13.1, match the following:
Damage to this nerve would cause difficulty in speech and swallowing, but no effect on visceral organs.

Question 57

Partial or total loss of smell is known as .

Question 58

Figure 13.1Using Figure 13.1, match the following:
Longest cranial nerve.

Question 59

Mr. Smith staggered home after a long night at the local pub. While attempting to navigate the stairs, he passed out cold and lay all night with his right armpit straddling the staircase banister. When he awoke the next morning, he had a severe headache, but what bothered him more was that he had no sensation in his right arm and hand. Explain what caused this symptom in his arm.

Question 60

Information regarding skeletal muscle tension is provided by and muscle length by .

Question 61

List and describe the functions of the three cranial nerves that serve the muscles of the eye.

Question 62

Figure 13.3Using Figure 13.3, match the following:
Name three unencapsulated sensory receptors and tell what they are used for.

Question 63

Figure 13.1Using Figure 13.1, match the following:
Innervates the superior oblique muscle.

Question 64

The perineurium defines the boundary of a .

Question 65

The facial nerve is cranial nerve number .

Question 66

Figure 13.1Using Figure 13.1, match the following:
Body movement receptors are called _ .

Question 67

Figure 13.3Using Figure 13.3, match the following:
Supplies all of the body except the posterior.

Question 68

Figure 13.2
Using Figure 13.2, identify the following components of the reflex arc:
Sensory neuron.

Question 69

The nerve is the largest of the cranial nerves.

Question 70

Dorsal and ventral rami are similar in that they both contain sensory and motor fibers.

Question 71

Figure 13.1Using Figure 13.1, match the following:
What is Wallerian degeneration?

Question 72

The glossopharyngeal nerve is the only cranial nerve that contains sensory fibers.

Question 73

Figure 13.3Using Figure 13.3, match the following:
All but T2-T12 branch and form nerve plexuses.

Question 74

Name an exteroceptor that is not a cutaneous receptor and explain why it is called an exteroceptor.

Question 75

Define tendon organs and muscle spindles relative to the stretch reflex.

Question 76

Figure 13.2
Using Figure 13.2, identify the following components of the reflex arc:
Effector.

Question 77

Figure 13.1Using Figure 13.1, match the following:
The thickest and longest nerve in the body is the nerve.

Question 78

Figure 13.3Using Figure 13.3, match the following:
Supplies the posterior body trunk.

Question 79

Distinguish between monosynaptic and polysynaptic reflexes and between ipsilateral and contralateral reflex responses.

Question 80

The dorsal ramus consists only of motor fibers bringing information to the spinal cord.