Ch 11: Continued

Question 1

Soma

Answer 1

Neuron cell body

Question 2

Nucleus on soma

Answer 2

Contain DNA

Question 3

Mitochondria on soma

Answer 3

Produce ATP

Question 4

Nissl bodies on soma

Answer 4

Produce proteins
- just like a Rough ER

Question 5

Golgi apparatus on soma

Answer 5

Modify, package and ship proteins

Question 6

Dendrites

Answer 6

Receive messages from neurons as electrical impulses

Question 7

Axon

Answer 7

Carry AP away from cell body

Question 8

Trigger zone

Answer 8

To generate AP

Question 9

What are two types of trigger zones

Answer 9

• soma side
• axon side

Question 10

Soma side trigger zone

Answer 10

Referred as axon hillock

Question 11

Axon side trigger zone

Answer 11

Referred as initial segment

Question 12

Myelin sheath

Answer 12

Insulate axon to increase velocity of AP
-(hopping motion)

Question 13

Mode of Ranvier

Answer 13

Space btw axon
- * saltatory conduction *
- also with hopping motion

Question 14

Two types of myelin sheath

Answer 14

• oligodendrocyte
• Schwann cell

Question 15

What is oligodendrocyte of myelin sheath

Answer 15

Myelin sheath in CNS

Question 16

What is Schwann cell in myelin sheath

Answer 16

Sheath in PNS

Question 17

Nucleus in cell bodies

Answer 17

Collection of cell bodies in CNS

Question 18

Ganglion

Answer 18

Collection of cell bodies in PNS

Question 19

Tracts on axon

Answer 19

Collection of axon in CNS

Question 20

Periphreal nerves of axon

Answer 20

Collection of axon in PNS

Question 21

Ascending tracts

Answer 21

Tracts ascending towards brain

Question 22

Descending tracts

Answer 22

Tract’s descending from brain

Question 23

Plexus

Answer 23

Extensive network of axons, outside of CNS

Question 24

Astrocyte

Answer 24

Cell that looks like star
- barrier formed btw blood and brain

Question 25

Blood brain barrier

Answer 25

Barrier from blood (circulatory) and brain

Question 26

Ventricle

Answer 26

4 cavities in brain

Question 27

Ependymal cells

Answer 27

Lining of cavity in the brain, brain stem, and spinal fluid

Question 28

Cerebrospinal fluid

Answer 28

Fluid in brain and spinal cord

Question 29

Choroid plexus

Answer 29

Produces cerebrospinal fluid

Question 30

Cilia in the choroid plexus

Answer 30

Helps move fluid to brought cavities of brain

Question 31

Microglial cell

Answer 31

Provide immunity for cells

Question 32

What are the two Myelinated axons

Answer 32

- node of ranvier - AP

Question 33

Characteristics of grey matter

Answer 33

- unmyelinated axons - cell bodies - dendrite - neuroglia

Question 34

What is grey matter

Answer 34

Peripheral aspect (outer)

Question 35

What is white matter

Answer 35

Central aspect (inner)

Question 36

Characteristics of white matter

Answer 36

- myelinated axons

Question 37

What does action potential do

Answer 37

Produce electrical signals (information) to other parts of the body

Question 38

Intracellular fluid

Answer 38

K+ * large proteins *

Question 39

Ligand

Answer 39

Chemical called acetylcholine - sodium potassium pump

Question 40

What is a neuron at rest that’s largely negative

Answer 40

Due to large proteins at rest E.C

Question 41

If CNS is damaged due to multiple sclerosis, what is also damaged?

Answer 41

- oligodendrocytes