1. What does CNS stand for?
What two organs make up the CNS?
What does PNS stand for?
What are the two functional subdivisions of the PNS?
If a division is describes as being visceral motor, what type of information is it carrying and in which direction is that information being transmitted?

2. Match each glial cell to the appropriate statement(s) on the right. The number behind each term indicates the number of statements it will match to.
oligodendrocyte (3)
satellite cell (3)
microglial cell (2)
astrocyte (3)
Schwann cell (2)
ependymal cell (2)

a. found in the PNS
b. produce myelin sheath
C. become macrophages when stimulated
d. regulate ion levels around neurons
e. found in the CNS
f. line spaces within the brain and spinal cord
g. surround the cell body
h. form part of the blood brain barrier
i. interact with multiple nerve fibers simultaneously

3. Multiple sclerosis is an autoimmune disease where the body's own immune cells destroy oligodendrocytes. Explain why this leads to changes in speed of conduction of nerve impulses and to both sensory and motor complications.

4. When the brain is deprived of oxygen for as little as four (4) minutes, neurons will die. The spaces that form in the brain because of the death of these neurons will be filled in by glial cells to become glial scars.
What special characteristic of neurons makes them dependent on oxygen?
Why don't the spaces formed in the brain by the death of neurons become filled in by new neurons instead of glial cells?

The structure of a reflex arc is very similar to that of a homeostatic control mechanism. Draw lines to match the homeostasis terms on the left to the spinal cord reflex arc components on the right.

stimulus
receptor
afferent pathway
control center
efferent pathway
effector

integration center
skeletal muscle
pain
axon of motor neuron
free nerve ending
saxon of sensory neuron

Now, draw the reflex arc out in the space below, so you can see the flow of information in the proper order.
If the integration center of the reflex arc consists of a single synapse, it is referred to as being             monosynaptic polysynaptic.
In an integration center contains multiple synapses, the reflex arc is referred to as being                   monosynaptic    polysynaptic.
The neurons that carry the information from the sensory neuron's axon to the dendrites of the motor neurons are functionally classified as _____________.

1. Sensory neurons are also called __________ neurons, and they send
2. their information Away from/Towards (circle correct answer) the Central Nervous System
3. Motor neurons are also called _______________ neurons, and they send
4. their information Away from/Towards (circle correct answer) the Central Nervous System.
5. ___________is a lipid covering that surrounds and insulates some axons.
6. Motor neuron cell bodies are located in the _______________region of the spinal cord.
7. The ___________ root that emerges from the spinal cord contains sensory information.
8. The meninges layer attached tightly to the brain and spinal cord is the ___________.
9. How many Cervical spinal nerves are there?
10. Inter neurons (or relay neurons) cell bodies are located in the ___________ of the spinal cord.
11. _____________ cells are different types of support cells found in the central and peripheral nervous system.
12. _______________ are branches extending from the neuron cell body that bring information INTO the cell.
13. What space is located between the dura mater and the arachnoid? _________
14. A cluster of cell bodies in the central nervous system is called a __________ .
15. A cluster of cell bodies located in the peripheral nervous system is called a __________.

1. What does CNS stand for? What two organs make up the CNS? What...