Cells of CNS

Question 1

what are the basic unit of the CNS

Answer 1

neurons

Question 2

what makes up a neuron

Answer 2

dendrites
axon
cell body (soma)

Question 3

axons or dendrites are myelinated?

Answer 3

axons

Question 4

function of dendrites

Answer 4

carries signals towards cell

Question 5

function of axon

Answer 5

carries signals away from cells

Question 6

function of glial cells

Answer 6

support cell - hold CNS together since very little connective tissue

Question 7

what is the most abundant type of cell in the CNS

Answer 7

glial cells

Question 8

what are the 4 types of glial cells

Answer 8

astrocytes (looks like a star)
oligodendrocytes
microglia
ependymal cells

Question 9

function of astrocytes

Answer 9

indirectly maintains blood-brain barrier and environmental homeostasis

Question 10

function of oligodendrocytes

Answer 10

produce myelin in CNS

Question 11

what produces myelin in PNS

Answer 11

schwann cells

Question 12

oligodendrocytes surround one axon true/false

Answer 12

false - oligodendrocytes have many branches extending to many axons (opposite with schwann cells)

Question 13

function of microglia

Answer 13

immune monitoring and antigen presenting

Question 14

what do microglia look like in resting and active states

Answer 14

resting - elongated nucleus and processes

active - become rounder

Question 15

what are ependymal cells

Answer 15

ciliated cuboidal epithelium

Question 16

what type of brain matter contains cell bodies, dendrites and glial cells

Answer 16

grey

Question 17

what does white matter contain

Answer 17

neuron axons and glial cells

Question 18

what are the three meninges layers

Answer 18

dura mater
arachnoid mater
pia mater