Deck 13: Peripheral Nervous System and Reflex Activity

Question 1

Most nerves in the human body are:

A) sensory.
B) motor.
C) mixed.
D) afferent.
E) efferent.

Answer 1

C

Question 2

Which of the following cranial nerves reaches the abdomen?

A) Vagus nerve
B) Trochlear nerve
C) Abducens nerve
D) Glossopharyngeal nerve
E) Accessory nerve

Answer 2

A

Question 3

Which of the following is not a mixed cranial nerve?

A) Facial nerve
B) Trigeminal nerve
C) Olfactory nerve
D) Oculomotor nerve
E) Vagus nerve

Answer 3

C

Question 4

Which of the following is true regarding proprioceptors?

A) They sense positions of skeletal muscles and joints.
B) They respond to senses of pressure, touch, and vibration.
C) They detect pressure in blood vessel walls.
D) They respond to stimuli as extreme heat or cold.
E) They respond to chemicals in solution.

Question 5

Which of the following nerves is the largest and longest branch of the sacral plexus?

A) Sciatic
B) Femoral
C) Brachial
D) Fibular
E) Tibial

Question 6

The brachial plexuses consist of which of the following?

A) The upper four cervical nerves
B) The last cervical nerves and four thoracic nerves
C) The lower four cervical nerves and first thoracic nerves
D) All cervical nerves
E) All cervical nerves and first thoracic nerves

Question 7

Which of the following receptors is important in the detection of painful stimuli?

A) Meissner's
B) Lamellar
C) Vanilloid
D) Tactile
E) Pacinian

Question 8

Which of the following cranial nerves attaches to the cerebrum?

A) Vagus nerve
B) Accessory nerve
C) Abducens nerve
D) Oculomotor nerve
E) Olfactory nerve

Question 9

Which of the following best describes spinal nerves?

A) Involuntary nerves
B) Interneuronal nerves
C) Only motor nerves
D) Only sensory nerves
E) Mixed nerves

Question 10

Which of the following is the largest cranial nerve?

A) Trigeminal nerve
B) Abducens nerve
C) Trochlear nerve
D) Oculomotor nerve
E) Optic nerve

Question 11

Which of the following is a tactile receptor that responds to deep pressure?

A) Ruffini corpuscle
B) Meissner's corpuscle
C) Merkel's disc
D) Root hair plexus
E) Free nerve ending

Question 12

Which of the following conditions results from inflammation of the facial nerve?

A) Cerebral palsy
B) Dyslexia
C) Apraxia
D) Bell's palsy
E) Ataxia

Question 13

Which of the following is true regarding thermoreceptors?

A) They are tonic receptors.
B) They are structurally different from cold stimuli.
C) They are scattered immediately beneath the surface of the dermis.
D) They are the most complex of the peripheral receptors.
E) They are also called tactile corpuscles.

Question 14

The receptors in the retina are examples of:

A) thermoreceptors.
B) nociceptors.
C) mechanoreceptors.
D) photoreceptors.
E) chemoreceptors.

Question 15

Which types of fibers carry painful sensations?

A) Type A and B
B) Type B and C
C) Type C and D
D) Type B and D
E) Type A and C

Question 16

Crude touch and pressure receptors only allow which of the following sensations?

A) Generalized
B) Fast pain
C) Slow pain
D) Type A and type D
E) Warm and cold

Question 17

Which of the following cranial nerve numbers is used to designate the oculomotor nerve?

A) IV
B) II
C) III
D) V
E) VI

Question 18

Which of the following cranial nerves is not one of the five branches of the facial nerve?

A) Buccal
B) Temporal
C) Zygomatic
D) Olfactory
E) Cervical

Question 19

Which of the following cranial nerves contains autonomic motor fibers?

A) Glossopharyngeal
B) Vagus
C) Vestibular
D) Accessory
E) Hypoglossal

Question 20

Which of the following are not joint kinesthetic receptors?

A) Lamellar corpuscles
B) Visceral receptors
C) Free nerve endings
D) Bulbous corpuscles
E) Proprioceptors

Question 21

Which of the following terms is used for groups of neuron cell bodies in the brain?

A) Nuclei
B) Ganglia
C) Internal capsule
D) Thalamus
E) Memory body

Question 22

Which of the following cranial nerves has three branches or divisions?

A) Glossopharyngeal
B) Oculomotor
C) Trochlear
D) Trigeminal
E) Vestibulocochlear

Question 23

Which of the cranial nerves was previously called the auditory nerve?

A) Trochlear
B) Trigeminal
C) Vagus
D) Facial
E) Vestibulocochlear

Question 24

Compression of which cranial nerve would result in a loss of tongue movement?

A) Trigeminal
B) Glossopharyngeal
C) Facial
D) Hypoglossal
E) Abducens

Question 25

Which of the following nerves form the cauda equina?

A) Sacral and coccygeal
B) Thoracic and lumbar
C) Lumbar and sacral
D) Lumbar and coccygeal
E) Lumbar, sacral, and coccygeal

Question 26

Which of the following spinal nerves innervate the muscles of the neck?

A) Cervical
B) Thoracic
C) Lumbar
D) Sacral
E) Coccygeal

Question 27

Which of the following terms describes the joining of the ventral rami of adjacent spinal nerves?

A) Tracts
B) Lateral nerves
C) Plexuses
D) Autonomic nerves
E) Dermatomes

Question 28

The phrenic nerves supply sensory and motor fibers to which of the following muscles?

A) Sternocleidomastoid
B) Diaphragm
C) Pectoralis minor
D) Levator scapula
E) Trapezius

Question 29

The ventral rami of spinal nerves C₅ to T₁ form which of the following plexuses?

A) Lumbar
B) Sacral
C) Thoracic
D) Brachial
E) Cervical

Question 30

Which of the following nerves is not found in the lumbar plexus?

A) Sciatic
B) Obturator
C) Genitofemoral
D) Saphenous
E) Femoral

Question 31

Which of the following nerves branches to the L₄, L₅, and S₁-S₃ ventral rami?

A) Sciatic
B) Pudendal
C) Superior gluteal
D) Inferior gluteal
E) Posterior femoral cutaneous

Question 32

Which of the following are reflexes that result from the connections between neurons during human development?

A) Visceral
B) Somatic
C) Innate
D) Acquired
E) Autonomic

Question 33

When the spinal cord is transected and all functions that it controls are depressed, which of the following terms is used?

A) Innate spinal reflex
B) Spinal shock
C) Autonomic reflex
D) Spinal stretch
E) Spinal death

Question 34

Which of the following reflexes are also known as myotatic reflexes?

A) Somatic
B) Autonomic
C) Visceral
D) Innate
E) Long

Question 35

Many visceral reflexes are regulated by the __________ and spinal cord.

Question 36

The longest and thickest nerve in the body is the __________ nerve.

Question 37

When the __________ nerve is compressed, carpal tunnel syndrome may occur.

Question 38

Thermoreceptors are phasic receptors that quickly __________ to stable temperature.

Question 39

Meissner's (tactile) corpuscles are located in __________ skin such as on the fingertips, lips, palms, soles, and nipples.

Question 40

Tendon organs are __________ inside tendons near junctions between the tendons and skeletal muscle.

Question 41

Sensory neurons may be called either tonic receptors or __________ receptors.

Question 42

Visceral pain may come from a different area of the body; this is known as __________ pain.

Question 43

The fibers in mixed nerves are classified according to the __________ of the body they innervate.

Question 44

The first pair of cranial nerves begins in the cerebrum and attaches to the __________.

Question 45

The optic nerve passes through the optic canal of each eye orbit, and forms the optic __________, where fibers cross over partially.

Question 46

Damage to one spinal root or segment does not totally __________ a limb muscle.

Question 47

The radial nerve is the largest branch of the __________ plexus.

Question 48

The __________ nerve is actually two nerves in a common sheath, called the tibial and common fibular nerves.

Question 49

Many __________ reflexes are regulated by the brain stem and spinal cord.

Question 50

The spinal cord controls some common somatic __________.

Question 51

Somatic reflexes provide important feedback when they are tested to __________ nervous system function.

Question 52

Damage to the __________ sheath in Guillain-Barre syndrome may be repaired.

Question 53

Sensory receptors are diverse but sensitive to certain types of environmental changes.

Question 54

The dorsal root is also known as the dorsal root ganglion.

Question 55

The ulnar nerve is the largest branch of the brachial plexus.

Question 56

The SNS consists of cranial and autonomic nerves.

Question 57

Chemoreceptive neurons are found in the carotid and aortic bodies.

Question 58

Sensation is the awareness of environmental changes.

Question 59

The ulnar nerve is the largest branch of the brachial plexus.

Question 60

Free nerve endings of the sensory neurons are very common in epithelia and connective tissues.

Question 61

Any temperatures outside the range of thermoreceptors activate the nociceptors and are perceived as painful.

Question 62

Encapsulated nerve endings include Merkel disc thermoreceptors.

Question 63

Pacinian corpuscles are also called lamellar corpuscles, which are scattered deep in the dermis and subcutaneous tissue.

Question 64

Fusiform proprioceptors throughout the skeletal muscle perimysium are called tendon organs.

Question 65

The processing in the cortical sensory areas is called adaptation.

Question 66

Acute pain fibers are thin and myelinated nerve fibers that conduct nerve impulses rapidly and cause sharp pain.

Question 67

The cranial nerves sense pain impulses originating from the head, and all other pain impulses travel through the spinal nerves.

Question 68

Most nerves are sensory nerves, and the other two types are mixed and relatively rare.

Question 69

The olfactory nerve is associated with the sense of hearing.

Question 70

Spinal nerves are only 1 to 2 cm in length and divide just after emerging from each foramen.