Histology Flashcards Preview

Hugh's MD1 Neuro > Histology > Flashcards

Flashcards in Histology Deck (27):
1

What makes white matter white?

Fatty myelin surrounding axons

2

What type of stain can you use to visualise the processes of neurons?

Silver stain

3

What type of cells produce CSF?

Choroid plexus cells

4

What type of cells are choroid plexus cells?

Specialised epithelial cells

5

Where are Ependymal cells located?

They line the central canal of the spinal cord

Lining the ventricles

6

What type of cell are ependymal?

Low columnar or cuboidal

7

True/False, neurons produce a lot of energy

False, they rely on surrounding cells to produce it for them

8

Which is the cytoskeletal components of neurons are dynamic?

Actin

and microtubules

9

What does actin in neurons allow for?

Spines on processes to extend out

10

Which cytoskeletal component allows for movement of proteins and other substances within the axon?

Microtubules

11

What is soma another name for?

Neuron cell body

12

Is the level of protein production in neurons high or low?

High

13

What are Nissl bodies?

The units of protein production in the neuron

They consist of rough ER and free ribosomes

14

What are astrocytes?

Support cells

15

What are glial cells?

Support cells for neurons

16

What are the three types of glial cells?

Astrocytes

Oligodendrocytes

Schwann cells

17

I am a cell whose function is to

- Neurotransmitter uptake and degradation

- K+ homeostasis

- Neuronal energy supply

- Maintainence of BBB

- Injury response and recovery

Who am I?

Astrocyte!

18

Why do glia cells produce glutamate transporters?

Glutamate is a neurotransmitter

Glial cells take up glutamate through those transporters to remove it from the synaptic clefts

19

How do glial cells communicate with each other?

Calcium waves

20

What initiates Ca waves in glial cells?

Neurotransmitters

Trauma

Inflammatory mediators

21

T/F Neurons are the only cells to release neurotransmitters in the CNS

No, glial cells do it too

22

How do glial cells regulate neurone function?

Release ATP in response to Ca waves to hyperpolarise the neurons. 

23

How can astrocytes regulate vascular tone?

Calcium waves cause contraction of astrocyte processes around blood vessels

24

What is the primary function of oligodendrocytes?

Myelination in the CNS

25

What cell can wrap around more than one axon, oligodendrocytes or schwann cells?

Oligodendrocytes

26

What is the general function of microglial cells?

Immune defense

27

What do microglia do to regulate normal function?

Send out processes that sample synapses