Types of neuroglia

Question 1

Define the neuroglia of the CNS

Answer 1

Astrocytes, oligodendrocytes, microglia and ependymal cells

Question 2

Define the neuroglia of the PNS

Answer 2

Satellite cells and Schwann cells

Question 3

Define astrocytes

Answer 3

Star shaped cell
Largest and most numerous of the neuroglia
Provides strength
Isolate neurons from CNS from harmful substances in blood
Learning and memory

Question 4

Define oligodendrocytes

Answer 4

Forms and maintains myelin sheath around axons

Insulates axons and increases the speed of nerve impulses and conduction

Question 5

Define Microglia

Answer 5

Slender and give off numerous spinelike projections
Act as phagocytes (ingest and sometimes digest foreign particles)
Removes cellular debris of nervous system

Question 6

Define ependymal cells

Answer 6

Cuboidal to columnar cells arranged in a single layer that posses microvilli and cilia
Lines the ventricles of the brain and central canal of spinal cord
Produce, monitor and assist in circulation of cerebrospinal fluid

Question 7

Define Schwann cells

Answer 7

Encircle PNS axons
Form myelin sheath around axons
Each Schwann cell myelinates a single axon
Participate in axon regeneration

Question 8

Define Satellite Cells

Answer 8

Flat cells that surround the cell bodies of neurons
Structural support
Regulates the exchange of materials between neuronal cells bodies and interstitial fluid