CNS Cell Types

Question 1

Name the 2 categories of CNS cells?

Answer 1

NEURONS
+
NEUROGLIA

Question 2

Neurons are _______________ nervous system cells, which perform the function of transmitting information.

Answer 2

PARENCHYMAL

Question 3

________ cell types are regenerating (hair).

Answer 3

LIBLE

Question 4

_________ cell types can regenerate (visceral organs).

Answer 4

STABLE

Question 5

__________ cell types include neurons and mm fibers.

Answer 5

PERMANENT

Question 6

Neurons are a _______________ cell type, meaning unreplicatable, well supplied with blood and immunity, and very resilient in repairing non-fatal injuries.

Answer 6

PERMANENT

Question 7

Will axon injury result in cell death in the PNS?

Answer 7

NOt necessarily

Question 8

Will axon injury result in cell death in the CNS?

Answer 8

YES

Question 9

What determines whether an axon is in the CNS or PNS?

Answer 9

IVF

Intervertebral Foramen

Question 10

What is the aka for cell membrane?

Answer 10

NEUROLEMA

Question 11

What is the term when a PNS axon encounters a lesion, and degenerates the distal part of the axon?

Answer 11

WALLERIAN DEGENERATION

fatal axonal injury in the PNS

Question 12

How long does it take for repair to begin where wallerian degeneration is taking place?

Answer 12

7 - 10 DAYS

Question 13

How much will the axon grow each day after wallerian degeneration?

Answer 13

1 - 2 mm REPAIR PER DAY

for 6 ish months

Question 14

What covers the damaged endonurium during wallerian degeneration?

Answer 14

SCHWANN CELLS

Question 15

Name the myelin producing cells of the CNS?

Answer 15

OLIGODENDROCYTE

Question 16

What is the term for a fatal axonal injury in the CNS?

Answer 16

RETROGRADE DEGENERATION

Question 17

What occurs during retrograde degeneration in the CNS?

Answer 17

CELL BODY LIVES 1 -2 YEARS
\+
CANNOT RETURN TO PREV FUNCTION
\+
EVENTUALLY DIES

Question 18

Name the 4 types of neuroglia in the CNS?

stable cell types

Answer 18

MICROGLIA
\+
ASTROCYTES
\+
EPENDYMAL
\+
OLIGODENDROCYTES

Question 19

Microglia are ___________ system cells, resident in the CNS tissues.

Answer 19

IMMUNE

Question 20

Name the 3 main functions of astrocytes?

Answer 20

1. BLOOD BRAIN BARRIER
2. STRUCTURAL SUPPORT
3. GLIOSIS

Question 21

How many neurons does each alcoholic drink kill?

Answer 21

125 000
(long term alcoholics develop brain damage)

Question 22

The BBB is good at blocking organics, but NOT good at blocking what?

Answer 22

SYNTHETICS

Question 23

What to ependymal cells create and deposit into vetricles, and the spinal cord?

Answer 23

CEREBROSPINAL FLUID

CSF

Question 24

What myelinates an axon?

Answer 24

OLIGODENDROCYTES