A&P - Chapter 18 (Part 5)

Question 1

Nerves

Answer 1

Bundles of peripheral never fibres held together by several layers of connective tissue

Question 2

Mixed nerves

Answer 2

Contain sensory and motor neurons

Question 3

What are nerves normally covered by?

Answer 3

Myelin sheath

Question 4

How does myelin appear in colour?

Answer 4

White

Question 5

White matter

Answer 5

Tissue composed primarily of myelinated axons

Question 6

Gray matter

Answer 6

Tissue composed primarily of cell bodies and unmyelinated fibres

Question 7

Nerve coverings

Answer 7

Individual axons, fascicles and nerves are surrounded by thin layers of fibrous connective tissues that have specific names based on their location

Question 8

What are 3 examples of nerve coverings?

Answer 8

1. Endoneurium
2. Perineurium
3. Epineurium

Question 9

Endoneurium

Answer 9

Tissues that surrounds individual nerve fibres/axons

- within/inside

Question 10

Perineurium

Answer 10

Tissue that surrounds individual fascicles

- around

Question 11

Fascicles

Answer 11

Bindles of nerve fibres/axons

Question 12

Epineurium

Answer 12

Tissues that surround numerous fascicles and blood vessels to form a complete nerve
- upon

Question 13

What is another word for axon?

Answer 13

Nerve fibre

Question 14

What is another word for bundle of axons?

Answer 14

Fascicle

Question 15

What is another word for bundle of fascicles?

Answer 15

Nerves

Question 16

What does the brain only have in terms of signals?

Answer 16

Tracts

- no nerves

Question 17

What do tracts not have?

Answer 17

Connective tissue coverings

Question 18

Where do nerves need to have a coat?

Answer 18

PNS

Question 19

Where do nerves not need to have a coat?

Answer 19

CNS

Question 20

What does a coat act as?

Answer 20

Protection

Question 21

White matter in the PNS?

Answer 21

Myelinated nerves

Question 22

White matter in the CNS?

Answer 22

Myelinated tracts

Question 23

Gray matter

Answer 23

Unmyelinated cell bodies and nerve fibres

Question 24

Where is gray matter found in the PNS?

Answer 24

Ganglia

Question 25

Where is gray matter found in the CNS?

Answer 25

Nuclei

Question 26

What is another word for a bundle of axons in the CNS?

Answer 26

A tract

Question 27

What are mature neurons incapable of?

Answer 27

Cell division

Question 28

What are neurons limited in?

Answer 28

Repair

Question 29

What happens if the damage is not extensive to the nerve?

Answer 29

The cell body and neurilemma are intact and scarring does not occur - fibres then can be repaired