Nerves 2

Question 1

Describe interneurons

Answer 1

Located within CNS
Interconnect among nerve cells
Function in Processing

Question 2

Satellite cells

Answer 2

Surround neuron cell bodies within ganglia in PNS

Keep things clean, regulate neurotransmitter concentration

Question 3

Schwann cells

Answer 3

Ensheath axons and dendrites in PNS

Question 4

Define unmyelinated axons

Answer 4

Schwann cell ensheath sections of many axons

Question 5

Define myelinated axons

Answer 5

Schwann cells ensheath a section of a single axon

Question 6

Define nodes of Ranvier

Answer 6

Gaps between Schwann cells

Question 7

Define oligodendrocytes

Answer 7

Surround myelinated and unmyelinated CNS axons

Question 8

Define Astrocytes

Answer 8

Largest, most numerous
Structural support in CNS
Scar tissue formation
Regulate interstitial fluid components
Blood brain barrier

Question 9

Describe the blood brain barrier

Answer 9

Restricts migration of cells and molecules out of brain’s capillaries
Restricts diffusion of CSF out of ventricles

Question 10

How does the blood brain barrier restrict migration of cells and molecules out of the capillaries of the brain

Answer 10

Tight junctions between endothelial cells

Astrocytes cover capillary surfaces

Question 11

How does blood brain barrier restrict diffusion of CSF out of ventricles

Answer 11

Tight junctions between ependymal cells

Question 12

True or false: the blood brain barrier is incomplete in some places

Answer 12

True

Question 13

Where is the blood brain barrier incomplete??

Answer 13

Parts of hypothalamus, pituitary gland, pineal gland

Question 14

What are microglia

Answer 14

Phagocytic cells that remove debris, pathogens, etc.

Question 15

What are ependymal cells?

Answer 15

Line chambers within CNS
Produce CSF in choroid plexus
Circulate CSF