Histology Of The Central Nervous System

Question 1

What is a special feature of perkinje cells?

Answer 1

They have a huge dendritic tree

Question 2

Name the layers of the cerebral cortex from outside to inside

Answer 2

Gray matter: Molecular layer, external granular layer, external pyramidal cell layer, internal granular layer, internal pyramidal cell layer, Multiform cel layer.

Then white matter on inside

Question 3

Name the layers of the Cerebellum from outside to inside

Answer 3

Gray matter: Molecular layer, perkinje cell layer, granular layer

Then white matter on the inside

Question 4

Which glial cell helps maintain the blood brain barrier?

Answer 4

Astrocytes

Question 5

What are the 3 different things that the end feet of astrocytes contact?

Answer 5

Blood vessels, pia mater, and neurons

Question 6

What is responsible for myelination in the central nervous system?

Answer 6

Oligodendrocytes

Question 7

What are the macrophages inside the central nervous system?

Answer 7

Microglia

Question 8

What are the epithelial cells inside the central nervous system?

Answer 8

Ependymal cells

Question 9

What are the 2 types of ependyma?

Answer 9

Ependymal cells and tanycytes

Question 10

What is the visual difference between an ependymal cell and a Tanycyte?

Answer 10

Ependymal cells usually have a cilium coming off of it

Question 11

Functions of ependyma

Answer 11

• making cerebral spinal fluid

- lining things that you don’t want bathed in cerebral spinal fluid

Question 12

What else has a foot that contacts the blood vessel?

Answer 12

Tanycyte

Question 13

What type of epithelium are the ependyma?

Answer 13

Simple cuboidal

Question 14

Where is the cerebral spinal fluid made and by what?

Answer 14

Third ventricle by choroid plexus

Question 15

Where should cerebral spinal fluid always be?

Answer 15

Deep to arachnoid matter; subarachnoid space

Question 16

Where is the fluid of the cerebral spinal fluid coming from?

Answer 16

Plasma of capillaries that the ependyma is wrapping up

Question 17

How do we get blood from the brain back out?

Answer 17

Dural venous sinus

Question 18

How do you get extra cerebral spinal fluid out?

Answer 18

Arachnoid villi

Question 19

What is it called when there is an accumulation of CSF in the ventricles and around the brain due to a blockage in the arachnoid villus?

Answer 19

Hydrocephalus

Question 20

How do you tell the difference between dendtrites and an axon on an electromicrograph?

Answer 20

There are no Nissle bodies at the axon hillock which leads to the axon