General Concepts #6 – Nervous System (2009)

Question 1

The peripheral nervous system (PNS) is comprised of ____ cranial nerves and ____
spinal nerves and their associated ganglia.
a) 7; 31
b) 7; 33
c) 12; 31
d) 12; 33
e) 10; 31

Answer 1

c) 12; 31

Question 2

Sympathetic nerves arise from what spinal segments?

a) Cranial and Thoracic
b) Cranial and Sacral
c) Thoracic and Lumbar
d) Thoracic and Sacral
e) Lumbar and Sacral

Answer 2

c) Thoracic and Lumbar

Question 3

Parasympathetic nerves arise from what spinal segments?

a) Cranial and Thoracic
b) Cranial and Sacral
c) Thoracic and Lumbar
d) Thoracic and Sacral
e) Lumbar and Sacral

Answer 3

b) Cranial and Sacral

Question 4

Neurotransmitters are released from:

a) Cell body
b) Organelles
c) Dendrites
d) Axons
e) Synaptic knobs

Answer 4

e) Synaptic knobs

Question 5

There are ____ nerves in the cervical region and ____ in the coccygeal region.

a) 7; 3
b) 7; 1
c) 8; 3
d) 8; 1
e) 6; 3

Answer 5

d) 8; 1

Question 6

Spinal cord levels that directly innervate bone are called:

a) Sclerotomes
b) Osteotomes
c) Myotomes
d) Dermatomes
e) Chronotomes

Answer 6

a) Sclerotomes

Question 7

In infants the spinal cord runs the entire canal but in adults it ends at:

a) T10
b) T12
c) L2
d) L4
e) S1

Answer 7

c) L2

Question 8

Vertebral canal enlargements at C3-T2 and L1-S3 are due to:

a) Secondary curves
b) Limb nerves
c) Weight bearing stress
d) Embryologic differentiation
e) Cardiac innervation

Answer 8

b) Limb nerves

Question 9

The outer meningeal layer of the spinal cord that is dense and inelastic is called the:

a) Dura mater (tough mother)
b) Pia mater (tender mother)
c) Arachnoid
d) Conus medularis
e) Cauda equina

Answer 9

a) Dura mater (tough mother)

Question 10

Denticulate ligaments span \_\_\_\_ and attach to the dura mater to support the spinal
cord.
a) Medially
b) Laterally
c) Superiorly
d) Inferiorly
e) Superficially

Answer 10

b) Laterally

Question 11

The connection of a dorsal root and ventral root form a:

a) Rootlet
b) Ganglion
c) Spinal nerve
d) Gray matter
e) White matter

Answer 11

c) Spinal nerve

Question 12

Sensory impulses enter the ____ root and motor impulses exit the ____ root.

a) Ventral; Ventral
b) Dorsal; Dorsal
c) Ventral; Dorsal
d) Dorsal; Ventral

Answer 12

d) Dorsal; Ventral