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Chapter 13 - The Peripheral Nervous System

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1
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Art-labeling Activity: Figure 13.2

Label the perceptual level, circuit level and receptor level of the brain.

See Diagram.

2
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Art-labeling Activity: Figure 13.4b

Label the structures of a nerve.

See Diagram

3
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Art-labeling Activity: Figure 13.10c

Label the Distribution of nerves on the brachial plexus.

See Diagram

4
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Art-labeling Activity: Figure 13.7

Label the Spinal Nerves

See Diagram

5
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Art-labeling Activity: Figure 13.11b

Label the nerves on the Lumbar Plexus

See Diagram

6

Severe whiplash, or acceleration flexion-extension neck injury, may cause numbness, tingling, or weakness in an accident victim’s arms. Most injuries happen in the C_5 and C_6 region. Which nerve plexus would this injury most likely involve?

brachial

7

A Morton’s (plantar) neuroma is a foot condition due to swelling of the common plantar digital nerve. It can cause excruciating pain felt between the third and fourth metatarsal bones when walking. Which of the following would NOT be a factor responsible for this disorder?

nerve thinning

8
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Art-labeling Activity: Figure 13.15

Label the correct order of a reflex arc.

See Diagram

9
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Which of the receptor types contributes to the sense of touch by responding to light pressure?

E

10

Which type of sensory receptor allows us to feel an insect landing on our skin?

mechanoreceptor

11

The sensory division of the PNS is also known as the efferent division.

False

Afferent flows towards the CNS (Sensory). Efferent flows away from the CNS.

12

Sensory stimuli that activate receptors generate action potentials that are sent into the CNS.

False

Sensory stimuli that activate receptors generate graded potentials in the receptor cell. These graded potentials ultimately pass the message on to a sensory neuron. If the graded potential is strong enough at the axon hillock it triggers an action potential that continues on to the CNS.

13

__________ are receptors that can respond to painful stimuli

Nociceptors

14

Which of the following is NOT used to classify sensory receptors?

the number of dendritic endings present

15

__________ do NOT exhibit the property of adaptation.

Tonic receptors

Tonic receptors provide a sustained response with little or no adaptation. Nociceptors and most proprioceptors are tonic receptors because of the protective importance of the information.

16

Which connective tissue layer directly surrounds every axon in a nerve?

endoneurium

17

Which of the following is NOT correct concerning nerves?

Nerves are collection of axons of either sensory or motor neurons but not both.

18

CNS nerve fibers regenerate because of the actions of Schwann cells.

False

PNS nerve fibers regenerate because of the actions of Schwann cells, Not CNS.

19

Choose the FALSE statement about nerves.

Axons make up a majority of the matter in a nerve.

20

Which of the following cranial nerves carries only motor information?

abducens

21

Which cranial nerve innervates most of the visceral organs?

vagus

22

Which cranial nerve transmits information about audition?

vestibulocochlear

23

What pair is incorrect?

CN IV - sensory

24

Which of the following carries no sensory information?

hypoglossal nerve

25

Damage to the ulnar nerve could result in the inability to ______.

flex the wrist

26

A herniated lumbar disc could interfere with ______.

All of the listed responses are correct.

27

Sciatica has no direct affect on ______.

control of the adductor longus

28

A knee-jerk reflex that is unusually strong may be caused by ______.

transmission of excitatory signals from the brain to the neurons that form the femoral nerve

29

Gluteal innervation comes from which plexus?

sacral

30

Spinal nerves are all classified as __________.

mixed nerves.

31

The phrenic nerve is a branch from the __________.

cervical plexus

32

A dermatome represents the motor innervation of muscles in that area.

False

33

In carpal tunnel syndrome, the __________ is compressed.

median

34

Which of the following is NOT required for a reflex arc?

interneurons