chapter 13: peripheral nervous system

Question 1

Which of the receptor types might function as a nociceptor?

Answer 1

A: Nociceptors

Question 2

Which of these receptor types functions as an exteroceptor?

Answer 2

All of them

Question 3

Which of the receptor types shown here functions exclusively as a proprioceptor?

Answer 3

B

Question 4

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

Answer 4

E

Question 5

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

Answer 5

mechanoreceptor

Question 6

Three main levels of neural integration operate in the somatosensory system. Which level involves the spinal cord?

Answer 6

circuit level

Question 7

Which connective tissue layer directly surrounds individual axons in a nerve?

Answer 7

endoneurium

Question 8

Which cranial nerve innervates most of the visceral organs?

Answer 8

vagus

Question 9

Which cranial nerve transmits auditory information?

Answer 9

vestibulocochlear

Question 10

Gluteal muscle innervation comes from which plexus?

Answer 10

sacral

Question 11

Spinal nerves are all classified as __________.

Answer 11

mixed nerves

Question 12

The phrenic nerve is a branch from the __________.

Answer 12

cervical plexus

Question 13

Which reflex is triggered when a stranger suddenly grasps your arm?

Answer 13

crossed-extensor reflex

Question 14

The knee-jerk reflex is an example of a __________.

Answer 14

stretch reflex

Question 15

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

Answer 15

the number of dendritic endings present

Question 16

True or False:
Sensory stimuli that activate receptors generate action potentials that are sent into the CNS.

Answer 16

False

Question 17

__________ are receptors that can respond to painful stimuli.

Answer 17

Nociceptors

Question 18

Which of the following is NOT correct concerning nerves?
A. Nerves do not contain cell bodies.
B. Nerves are analogous to tracts in the CNS.
C. Nerves are covered by an outer sheath called the epineurium.
D. Nerves are collection of axons of either sensory or motor neurons but not both.

Answer 18

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

Question 19

Which of the following cranial nerves carries only motor information?
A. optic
B. olfactory
C. abducens
D. trigeminal

Answer 19

C. abducens

Question 20

Which pair below is incorrect?
A. cranial nerve III: oculomotor nerve
B. cranial nerve III: pupillary constriction
C. optic nerve: sensory
D. cranial nerve IV: sensory
E. cranial nerve VI: eye movement

Answer 20

D. cranial nerve IV: sensory

Question 21

Which of the following carries no sensory information?
A. optic nerve
B. trigeminal nerve
C. vestibulocochlear nerve
D. hypoglossal nerve

Answer 21

D. hypoglossal nerve

Question 22

In carpal tunnel syndrome, the __________ is compressed.

Answer 22

median nerve

Question 23

Which of the following is NOT required for a reflex arc?
A. motor neurons
B. receptors
C. sensory neurons
D. interneurons

Answer 23

D. interneurons

Question 24

You are removing a hot pan of cookies from the oven, using a pot holder. Suddenly, you feel a surge of heat through the pot holder. Why don’t you react by dropping the baking pan and spilling cookies all over the floor?

Answer 24

Cortical integration centers override the spinal reflex.

Question 25

Classify the neuron at A.

Answer 25

sensory neuron

Question 26

The synapse between which of the following two neurons is a part of a monosynaptic reflex arc?

Answer 26

A + B

Question 27

The letter E would represent which of the following muscles during the knee-jerk reflex?

Answer 27

rectus femoris

Question 28

True or False:
The sensory division of the PNS is also known as the efferent division.

Answer 28

False