PNS WI18-Glia Cells

Question 1

This cell in the CNS is described as an octopi shaped cell due to its processes that wrap around and myelinated several axons.

Answer 1

Oligodendrocytes

Question 2

This cell is the most abundant glial cell. It is star shaped and has structural and physiological functions.

Answer 2

Astrocytes

Question 3

What is the physiological function of astrocytes?

Answer 3

Astrocytes serve in metabolic processes, exchanging ions, as well as nutrients and waste between neurons and interstitial fluid.

Question 4

What is the structural function of astrocytes?

Answer 4

Astrocytes provide support to hold fibers in place, taking up space between between neurons

Question 5

What is the function of astrocytes during injury?

Answer 5

They form scar tissue

Question 6

These cells are ciliated pseudostratified epithelial cells that along with the capillaries form the choroid plexus and produce CSF

Answer 6

Ependymal cell

Question 7

T/F: Ependymal cells are thought to be stem cells due to recent success growing neurons

Answer 7

True

Question 8

These glial cells are considered the immune system cell of the nervous system. They have phagocytic function.

Answer 8

Microglia

Question 9

When a neuron is under stress what occurs?

Answer 9

1. Neuron sends out a distress signal
2. Microglia appear and transform
3. Microglia engulf and digest antigens
4. Distress signal stops and neuron returns to normal.

Question 10

This glial cell myelinate one aspect of the axon multiple times with a phospholipid membrane, facilitates regrow Th of axons and helps regulates neuron metabolism.

Answer 10

Schwann cell (PNS)

Question 11

What is unique about the node of ranvier in terms of signal conduction

Answer 11

The node of ranvier allows for signal to skip and go faster.

The difference in spacing controls the speed of conduction

Question 12

This glial cell is a flatten schwann cells, located around pseudounipolar neurons.

They are thought to have the Same function as astrocytes.

They are only located in the peripheral nervous system

Answer 12

Satelite cells

Question 13

Defects in the myelination of axons leads to?

Answer 13

Autoimmune

Weakness

Loss of reflex

Numb feeling

Question 14

Definition: Progressive e degenerative disease of the brain found in people(typically athletes) with repetitive trauma to the head

Answer 14

Chronic traumatic encephalopathy

Question 15

Multiple sclerosis affects which nervous system?

Answer 15

Central nervous system (typically affects women)

Question 16

This disorder is idiopathic although it seems to be ignited by previous infection. Believed to be immunological

Typically affects men and PNS.

Has symptoms of progressive motor weakness, sensory loss, and areflexia

Answer 16

Guillain-Barré syndrome

Question 17

23% of all brain tumors are _______

Answer 17

Astrocytomas (due to abundance)

Question 18

8% of brain tumors are accounted for by

Answer 18

Ependymal cell =ependyomas

Question 19

3% of all brain tumors are accounted for by_______

Answer 19

Oligodendrogliomas