Nerve

Question 1

What do neurons do?

Answer 1

Process and transmit info. No new neurons

Question 2

What do dendrites and axons do?

Answer 2

Dendrites receive, axons transmit

Question 3

What is an axon hillock?

Answer 3

V shaped lead in to axon, no RER(nissl bodies)

Question 4

What produces myelin in PNS? CNS?

Answer 4

Schwann cells.

Oligodendrocytes. One per axon

Question 5

What does SER in neuron do?

Answer 5

Store calcium

Question 6

Where are MAPs found?

Answer 6

Only in brain. Microtubules

Question 7

Lipofuscin?

Answer 7

Indigestible materiel in lysosomes

Question 8

Difference between bipolar and pseudounipolar?

Answer 8

Pseudo forms T junction with axon and dendrite. Bipolar in eye and ear, pseudo in dorsal root ganglion

Question 9

Nerves use microtubules to deliver macromolecules within self. What are the motors?

Answer 9

Kinesin our, dynein in

Question 10

Synapses?

Answer 10

Mostly chemical. Neurotransmitters released by exocytosis, alter membrane properties of receptor

Question 11

What do glia do?

Answer 11

Support and insulate neurons. Can divide, so most nervous tumors are glial

Question 12

Astrocytes contain what diagnostic marker?

Answer 12

GFAP. Part of blood brain barrier

Question 13

What does ependyma do?

Answer 13

Make CSF

Question 14

Microglia function?

Answer 14

Immune surveillance

Question 15

Do nerves have fascical layers?

Answer 15

Yes. Epi, peri, endo. Look wavy

Question 16

Do Dorsal root ganglia have capsules? Autonomic ganglia? Differences?

Answer 16

Yes to both. Autonomic not completely surrounded by glial cells

Question 17

What are pacinian corpuscles?

Answer 17

Deep touch sensors