Class Quiz 9 Flashcards

The dorsal root ganglia mainly contain

cell bodies of sensory neurons.

axons of sensory neurons.

cell bodies of motor neurons.

axons of motor neurons.

synapses.

The spinal cord has gray matter on the:

outside, white matter on the inside, and a posterior motor root.

inside, white matter on the outside, and a anterior motor root.

inside, white matter on the outside, and a posterior motor root.

outside, white matter on the inside, and a anterior motor root.

Axon crossing from one side of the spinal cord to the other within the gray
matter are found in the:

anterior gray horns

lateral gray horns

posterior gray horns

gray commissures

white commissures

The adult spinal cord only extends to which vertebral level?

coccyx

sacral

third or fourth lumbar

first or second lumbar

last thoracic

The ________ nerve, which arises in the cervical plexus, innervates the
diaphragm.

lesser occipital

radial

phrenic

ansa cervicalis

sciatic

Which of the following nerves does not arise from the brachial plexus?
median
phrenic
radial
ulnar

The white matter of the spinal cord contains

both axons and dendrites.

interneurons.

sensory and motor nuclei.

bundles of axons with common origins, destinations, and functions.

bundles of dendrites with common origins, destinations, and functions.

The posterior root ganglia contain:

axons of motor neurons

axons of sensory neurons

cell bodies of motor neurons

cell bodies of sensory neurons

interneurons

Spinal nerves from the sacral region of the cord innervate the ________
muscles.

leg

shoulder

facial

abdominal

intercostal

The outward projections from the central gray matter of the spinal cord are
called

wings.

horns.

fibers.

pyramids.

tracts.

Spinal nerves are_________nerves

purely sensory

purely motor

mixed

interneuronal

involuntary

The _____________ is a stand of connec!ve !ssue that connects to the
coccygeal ligament and prevents longitudinal movements of the spinal cord.

conus medullaris

filum terminale

cauda equina

dorsal root

ventral root

If the posterior root of a spinal nerve were cut, what would be the result in
the tissue or region that nerve supplies?

complete loss of sensation

complete loss of voluntary movement

loss of neither sensation or movement but only of autonomic control

complete loss of sensation and movement

The subarachnoid space lies between which two layers of meninges?

arachnoid and epidura

arachnoid and pia

arachnoid and dura

pia and dura

The entire spinal cord gives rise to _____ pair of spinal nerves.

5

12

25

31

35

The ________ of each spinal nerve innervates the skin and muscles of the
back.

dermatome

ventral ramus

white ramus communicantes

gray ramus communicantes

dorsal ramus

The layer of connective tissue that surrounds a fascicle within a peripheral
nerve is the

epineurium.

perineurium.

epimysium.

endoneurium.

endosteum.

Muscles of the neck and shoulder are innervated by spinal nerves from the
________ region.

cervical

lumbar

thoracic

sacral

coccygeal

Spinal nerves exiting the cord from the level of L4 to S4 form the:

lumbar plexus

femoral plexus

sacral plexus

thoracic plexus

Side to side movements of the spinal cord are prevented by:

filum terminale

denticulate ligaments

dura mater

pia mater