Chapter 14

The phrenic nerve is a spinal nerve branch innervating the diaphragm muscle. (True or False)

Polysynaptic reflexes are generally faster than monosynaptic reflexes. (True or False)

Cranial nerves are considered part of the central nervous sytem. (True or False)

There are 62 spinal nerves in the human body,

The optic nerve controls the muscles that move the eyeball. (True or False)

Axons in the peripheral nervous system are meylinated by neuroglial cells called __________.

Cell bodies of afferent neurons are located in the __________.

Another name for the vestibulocochlear nerve is the __________ nerve.

__________ is the neurotransmitter that is released by somatic motor nerves at the skeletal muscle motor endplate.

The most cephalic group of spinal nerves are the __________ nerves.

The sciatic nerve arises from the __________ plexus.

Efferent spinal neurons carrying impulses from the CNS to the skeletal muscles will most likely have their somas located in the
a) spinal cord white matter
b) spinal cord gray matter
c) central spinal canal
d) ventral root ganglion
e) dorsal root ganglion

Sudden appearance of "cross eyes" would most likely indicate a lesion of which cranial nerve?
a) oculomotor
b) abducens
c) trigeminal
d) vestibulocochlear
e) trochlear

After brain surgery, a patient has difficulty with mastication and experiences numbness of the teeth and gums. This defect could be caused by a severed:
a) vestibulococohlear nerve
b) accessory nerve
c) glossopharyngeal nerve
d) trigeminal nerve
e) facial nerve

The primary cranial nerve for movement of the tongue is the __________ nerve.
a) hypoglossal
b) brachial
c) spinal accessory
d) vagus
e) glossopharyngeal

Severing only the ventral root of a cervical spinal nerve would cause loss of some
a) autonomic motor function
b) somatic motor function
c) sensory perception
d) a and b
e) all of the above

Severing only the dorsal root of a thoracic spinal nerve would cause loss of some
a) autonomic motor function
b) somatic motor function
c) sensory perception
d) a and b
e) all of the above

The cell bodies of somatic efferent neurons of the spinal nerves are located in the
a) dorsal root
b) gray matter of the spinal cord
c) ventral root
d) white matter of the spinal cord
e) spinal plexus

Which of the following cranial nerves is not directly associated with the eye?
a) optic
b) trochlear
c) trigeminal
d) abducens
e) oculomotor

A person who had lost all taste sensation would most likely be experiencing pathology of the __________ nerve(s).
a) glossopharyngeal
b) hypoglossal
c) facial
d) a and c
e) b and c

As a result of a car accident in which he was thrown through the windshield, John Doe is experiencing balance problems. Which cranial nerve was mostly damaged?
a) occulomotor
b) spinal accessory
c) trigeminal
d) facial
e) auditory

Which of the following drugs mimics the action of acetylcholine at the skeletal muscle motor endplate?
a) cocaine
b) Novocain
c) caffeine
d) nicotine
e) amphetamines