6 - Glial Cells Form and Function Flashcards
1
Q
what are the divisions of glial cells?
A
microglia
macroglia
- shwann cell
- oligodendrocytes
- epemdymal cells
- astrocytes
2
Q
difference between oligo and shwann cells?
A
oligo
- found in CNS
- cant regenerate
- myelinate up to 30
shwann
- can regenerate
- PNS
- only one
3
Q
form and function of ependymal cells?
A
form
- form walls of the ventricles in the brain and central canal of spinal cord
- ciliated to propel CSF
function - produce CSF
4
Q
function of ependymal cells?
A
general
- guide axons during development [neurogenesis]
- astrocytes grow first then axons
K-Buffer
- take up excess K ions due to neuron firing
- express transporters
Prevent NT outside of synapse
- NT transporters
- prevemt NT diffusing outside the synapse
Protect Synapse
- prevent entry into synapse [from ECF]
Nuerovascular coupling
- attach neurones to capilaires
- provide nutrinets
- glucose to lactose
Respond to Insult
- release ATP/Glutamate when damaged
- Reactive Astrogliosis [prolifer and hypertrophy of astrocytes]
5
Q
form and function of microglia?
A
form
- arise from bone marrow monocytes
function
- immune response in the CNS
- phagocytic form in resp to danger
- Reactive Microgliosis
6
Q
which cells are found in CNS and PNS?
A
CNS
- ependymal
- oligo
- microglia
- astrocytes
PNS
- satellite
- shwann
