intro to neuro

Question 1

how many neurons do we have

Answer 1

86-100 billion

Question 2

how many glia do we have

Answer 2

100 billion+,
more than neurons

Question 3

how to see cells of the brain

Answer 3

Nissl Staining

Question 4

what does Nissl staining show about brain cells

Answer 4

Organisation/arrangement/density

Question 5

What part of neurons does Nissl stain

Answer 5

cytoplasmic granules in neuronal soma: called nissl bodies

Question 6

What does silver based stain, stain

Answer 6

Entire neurons

Question 7

What does silver based stain show

Answer 7

Neuron structure

Question 8

which neurons are highly branched and where are they found

Answer 8

Purkynje cells, found in cerebellum

Question 9

name the type of glial cells in CNS

Answer 9

astrocytes
oligodendrocytes
microglia
ependymal

Question 10

Types of neurons

Answer 10

unipolar
bipolar
multipolar

Question 11

where are synapses made by axons

Answer 11

dendritic spines

Question 12

which glial cell type forms the BBB

Answer 12

astrocytes

Question 13

most abundant glial cell type

Answer 13

astrocyte

Question 14

function of astrocytes

Answer 14

maintaining extracellular fluids (take up K+)
release gliotransmitters

Question 15

function of oligodendrocytes

Answer 15

produce myelin in CNS
one oligodendrocyte for multiple neurons

Question 16

benefit of node of ranvier

Answer 16

conserves resources as ion channels concentrated at few points

Question 17

function of microglial cells

Answer 17

associated with macrophages
ingest pathogen
get primed and activated and release immunoglobins

Question 18

number of axons and dendrites in uni, bi and multipolar neurons

Answer 18

uni: 1 axon, 0 dendrites
bi: 1 axon, 1 dendrite
multi: 1 axon, many dendrites

Question 19

name type of glial cells in PNS

Answer 19

schwann cells, satellite cells