Introduction to nervous system histology Flashcards
1
Q
Which type of glial cell is the most common in the CNS?
A
Astrocytes
2
Q
What are the 3 layers of the cerebellum cortex starting with the outermost?
A
Molecular layer
Purkinje layer
Granular layer
3
Q
What is the function of myelin?
A
Insulates the axon and reduces the amount of charge lost across the membrane, which greatly increases the conduction speed of an action potential
4
Q
Which 4 regions lack a blood-brain barrier?
A
Pituitary gland
Pineal gland
Median eminence of the hypothalamus
Area postrema
5
Q
What is the function of the area postrema?
A
Acts as the “vomiting centre” by detecting toxins in the blood that can induce emesisW
6
Q
Which type of glial cell maintains the blood-brain barrier?
A
Astrocytes
7
Q
Astrocytes regulate extracellular levels of which ion?
A
Potassium
