Nervous System

Question 1

Which of the following associations is incorrect?
8 cervical spinal nerves
5 sacral spinal nerves
1 coccygeal spinal nerve
5 lumbar spinal nerves
11 thoracic spinal nerves

Answer 1

11 thoracic spinal nerves
(12 is correct)

Question 2

Reflexes based on synapses formed during development are ________ reflexes.
visceral
acquired
vegetative
somatic
innate

Answer 2

innate

Question 3

The flexor reflex
prevents a muscle from generating damaging tension.
prevents a muscle from overstretching.
moves a limb away from a painful stimulus.
is an example of a monosynaptic reflex.
usually depends on cranial neurons.

Answer 3

moves a limb away from a painful stimulus.

Question 4

In which plexus does the ulnar nerve arise?
cranial
lumbar
sacral
cervical
brachial

Answer 4

brachial

Question 5

The tough, fibrous, outermost covering of the spinal cord is the
pia mater.
dura mater.
periosteum.
arachnoid.
epidural block.

Answer 5

dura mater.

Question 6

The dorsal root of a spinal nerve contains
axons of sensory neurons.
cell bodies of motor neurons.
axons of motor neurons.
interneurons.
cell bodies of sensory neurons.

Answer 6

cell bodies of sensory neurons.

Question 7

The layer of connective tissue that surrounds a fascicle within a peripheral nerve is the
endosteum.
endoneurium.
perineurium.
epineurium.
epimysium.

Answer 7

perineurium.

Question 8

Spinal nerves are
both sensory and motor.
purely sensory.
interneuronal.
purely motor.
involuntary.

Answer 8

both sensory and motor.

Question 9

Reflexes can be classified according to all of the following, except
their development.
whether they are sensory or motor.
where information processing occurs.
the motor response.
the complexity of the neural circuit.

Answer 9

whether they are sensory or motor.

Question 10

A dorsal and ventral root of each spinal segment unite to form a
spinal meninx.
spinal nerve.
spinal ganglion.
lumbar enlargement.
cervical enlargement.

Answer 10

spinal ganglion.

Question 11

The layer of the meninges in direct contact with the spinal cord is the
pia mater.
subarachnoid space.
choroid plexus.
dura mater.
arachnoid.

Answer 11

pia mater.

Question 12

The spinal cord is part of the
afferent nervous system.
autonomic nervous system.
central nervous system.
somatic nervous system.
peripheral nervous system.

Answer 12

CNS

Question 13

The ________ nerve, which arises in the cervical plexus, innervates the diaphragm.
lesser occipital
radial
sciatic
ansa cervicalis
phrenic

Answer 13

phrenic

Question 14

Cerebrospinal fluid flows within the
filum terminale.
dura mater.
arachnoid mater.
pia mater.
subarachnoid space.

Answer 14

subarachnoid space.

Question 15

The ventral root of a spinal nerve contains
axons of sensory neurons.
axons of motor neurons.
cell bodies of sensory neurons.
interneurons.
cell bodies of motor neurons.

Answer 15

axons of motor neurons.