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prepared by Mark Hollier,
Georgia Perimeter College Clarkston Campus
CHAPTER
13
The Peripheral
Nervous
System and
Reflex Activity
© Annie Leibovitz/Contact Press Images
© 2013 Pearson Education, Inc.
______ are stimulated when sound waves
vibrate hair cells in the inner ear.
a)
b)
c)
d)
Mechanoreceptors
Thermoreceptors
Photoreceptors
Nociceptors
© 2013 Pearson Education, Inc.
______ are stimulated when sound waves
vibrate hair cells in the inner ear.
a)
b)
c)
d)
Mechanoreceptors
Thermoreceptors
Photoreceptors
Nociceptors
© 2013 Pearson Education, Inc.
Which of the following pairs of receptors
appear to play complementary roles in hairy
and hairless skin?
a)
b)
c)
d)
Tactile discs and lamellar corpuscles
Bulbous corpuscles and hair follicle receptors
Tendon organs and tactile corpuscles
Tactile corpuscles and hair follicle receptors
© 2013 Pearson Education, Inc.
Which of the following pairs of receptors
appear to play complementary roles in hairy
and hairless skin?
a)
b)
c)
d)
Tactile discs and lamellar corpuscles
Bulbous corpuscles and hair follicle receptors
Tendon organs and tactile corpuscles
Tactile corpuscles and hair follicle receptors
© 2013 Pearson Education, Inc.
At which level of the somatosensory system
are conscious decisions made about
low-grade touch stimuli?
a)
b)
c)
d)
Receptor level
Circuit level
Perceptual level
Effector level
© 2013 Pearson Education, Inc.
At which level of the somatosensory system
are conscious decisions made about
low-grade touch stimuli?
a)
b)
c)
d)
Receptor level
Circuit level
Perceptual level
Effector level
© 2013 Pearson Education, Inc.
When you first enter a movie theater, the
smell of popcorn overwhelms you. Once
the movie has ended, however, you don't
notice the popcorn smell. You have
experienced ________.
a)
b)
c)
d)
phasic sensation
tonic sensation
generator sensation
adaptation
© 2013 Pearson Education, Inc.
When you first enter a movie theater, the
smell of popcorn overwhelms you. Once
the movie has ended, however, you don't
notice the popcorn smell. You have
experienced ________.
a)
b)
c)
d)
phasic sensation
tonic sensation
generator sensation
adaptation
© 2013 Pearson Education, Inc.
An intensely painful stimulus is
distinguished from a mildly painful one by
_______.
a)
b)
c)
d)
a higher frequency of action potentials initiated
higher-magnitude action potentials
an increased number of receptors stimulated
all of the above
© 2013 Pearson Education, Inc.
An intensely painful stimulus is
distinguished from a mildly painful one by
_______.
a)
b)
c)
d)
a higher frequency of action potentials initiated
higher-magnitude action potentials
an increased number of receptors stimulated
all of the above
© 2013 Pearson Education, Inc.
Ganglia associated with efferent nerve
fibers mostly contain cell bodies of ______.
a)
b)
c)
d)
autonomic sensory neurons
somatic sensory neurons
autonomic motor neurons
somatic motor neurons
© 2013 Pearson Education, Inc.
Ganglia associated with efferent nerve
fibers mostly contain cell bodies of ______.
a)
b)
c)
d)
autonomic sensory neurons
somatic sensory neurons
autonomic motor neurons
somatic motor neurons
© 2013 Pearson Education, Inc.
The perineurium ______.
a)
b)
c)
d)
encloses all the fascicles to form a nerve
surrounds axons and Schwann cells
binds groups of fibers into bundles
contains sensory neurons only
© 2013 Pearson Education, Inc.
The perineurium ______.
a)
b)
c)
d)
encloses all the fascicles to form a nerve
surrounds axons and Schwann cells
binds groups of fibers into bundles
contains sensory neurons only
© 2013 Pearson Education, Inc.
CNS and PNS neurons differ in their
regeneration capability, mainly
because ______.
a)
b)
c)
d)
PNS neurons are associated with supporting cells
that promote rapid cleanup and regrowth of new
axons
CNS neurons are associated with oligodendrocytes
that contain growth-inhibiting proteins
The statement is not true; neither PNS nor CNS
neurons are capable of axon regeneration.
Both a and b are true.
© 2013 Pearson Education, Inc.
CNS and PNS neurons differ in their
regeneration capability, mainly
because ______.
a)
b)
c)
d)
PNS neurons are associated with supporting cells
that promote rapid cleanup and regrowth of new
axons
CNS neurons are associated with oligodendrocytes
that contain growth-inhibiting proteins
The statement is not true; neither PNS nor CNS
neurons are capable of axon regeneration.
Both a and b are true.
© 2013 Pearson Education, Inc.
Which cranial nerve is the exception and
travels to the thoracic and abdominal
cavities?
a)
b)
c)
d)
Trochlear
Trigeminal
Vestibulocochlear
Vagus
© 2013 Pearson Education, Inc.
Which cranial nerve is the exception and
travels to the thoracic and abdominal
cavities?
a)
b)
c)
d)
Trochlear
Trigeminal
Vestibulocochlear
Vagus
© 2013 Pearson Education, Inc.
Which of the following cranial nerves has
both sensory and motor functions?
a)
b)
c)
d)
Facial
Trochlear
Hypoglossal
Accessory
© 2013 Pearson Education, Inc.
Which of the following cranial nerves has
both sensory and motor functions?
a)
b)
c)
d)
Facial
Trochlear
Hypoglossal
Accessory
© 2013 Pearson Education, Inc.
The dorsal roots along the spinal cord
contain _______ neurons, while the dorsal
rami contain ________ neurons.
a)
b)
c)
d)
motor; motor
sensory; mixed
sensory; motor
motor; mixed
© 2013 Pearson Education, Inc.
The dorsal roots along the spinal cord
contain _______ neurons, while the dorsal
rami contain ________ neurons.
a)
b)
c)
d)
motor; motor
sensory; mixed
sensory; motor
motor; mixed
© 2013 Pearson Education, Inc.
Predict the outcome of damage to one cord
of the left brachial plexus.
a)
b)
c)
d)
Only a portion of the left limb will suffer
reduced function.
The entire left limb will be paralyzed.
The entire right limb will be paralyzed.
Only a portion of the right limb will suffer reduced
function.
© 2013 Pearson Education, Inc.
Predict the outcome of damage to one cord
of the left brachial plexus.
a)
b)
c)
d)
Only a portion of the left limb will suffer
reduced function.
The entire left limb will be paralyzed.
The entire right limb will be paralyzed.
Only a portion of the right limb will suffer reduced
function.
© 2013 Pearson Education, Inc.
If irritated, this nerve will cause hiccups.
a)
b)
c)
d)
Cervical plexus
Cutaneous nerve
Phrenic nerve
Lesser occipital nerve
© 2013 Pearson Education, Inc.
If irritated, this nerve will cause hiccups.
a)
b)
c)
d)
Cervical plexus
Cutaneous nerve
Phrenic nerve
Lesser occipital nerve
© 2013 Pearson Education, Inc.
A physician can determine the approximate
location of a spinal injury simply by testing
areas of the skin for numbness. These skin
areas are referred to as ______.
a)
b)
c)
d)
dermatomes
cutaneous areas
dermozones
cutaneous zones
© 2013 Pearson Education, Inc.
A physician can determine the approximate
location of a spinal injury simply by testing
areas of the skin for numbness. These skin
areas are referred to as ______.
a)
b)
c)
d)
dermatomes
cutaneous areas
dermozones
cutaneous zones
© 2013 Pearson Education, Inc.
For conscious muscle movements, activity
of the ______ is required.
a)
b)
c)
d)
precommand areas
central program generators
reflex arc
indirect system
© 2013 Pearson Education, Inc.
For conscious muscle movements, activity
of the ______ is required.
a)
b)
c)
d)
precommand areas
central program generators
reflex arc
indirect system
© 2013 Pearson Education, Inc.
Which precommand structure inhibits
various motor centers of the brain?
a)
b)
c)
d)
Cerebellum
Brain stem nuclei
Spinal cord
Basal nuclei
© 2013 Pearson Education, Inc.
Which precommand structure inhibits
various motor centers of the brain?
a)
b)
c)
d)
Cerebellum
Brain stem nuclei
Spinal cord
Basal nuclei
© 2013 Pearson Education, Inc.
Quickly lifting your foot and leg after
stepping on a rock is an example of a(n)
________.
a)
b)
c)
d)
learned reflex
intrinsic reflex
voluntary action
central program generator
© 2013 Pearson Education, Inc.
Quickly lifting your foot and leg after
stepping on a rock is an example of a(n)
________.
a)
b)
c)
d)
learned reflex
intrinsic reflex
voluntary action
central program generator
© 2013 Pearson Education, Inc.
The length of a muscle is communicated to
the brain via a __________.
a)
b)
c)
d)
tendon organ
nociceptor
muscle spindle
lamellar corpuscle
© 2013 Pearson Education, Inc.
The length of a muscle is communicated to
the brain via a __________.
a)
b)
c)
d)
tendon organ
nociceptor
muscle spindle
lamellar corpuscle
© 2013 Pearson Education, Inc.
A tendon reflex involves ______.
a)
b)
c)
d)
muscle contraction and shortening
muscle relaxation and lengthening
muscle contraction and lengthening
muscle relaxation and shortening
© 2013 Pearson Education, Inc.
A tendon reflex involves ______.
a)
b)
c)
d)
muscle contraction and shortening
muscle relaxation and lengthening
muscle contraction and lengthening
muscle relaxation and shortening
© 2013 Pearson Education, Inc.
The crossed-extensor reflex is important
when ______.
a)
b)
c)
d)
someone taps on your patellar tendon
a bright light shines in your eyes
you overextend your leg during the long jump
you step barefoot on a sharp object
© 2013 Pearson Education, Inc.
The crossed-extensor reflex is important
when ______.
a)
b)
c)
d)
someone taps on your patellar tendon
a bright light shines in your eyes
you overextend your leg during the long jump
you step barefoot on a sharp object
© 2013 Pearson Education, Inc.