Nervous System

Question 1

CNS

Answer 1

Brain & Spinal Cord

Question 2

PNS

Answer 2

Spinal nerves (31)
Cranial Nerves (12)

Question 3

Somatic

Answer 3

Voluntary
Mucle,
Sesnsation

Question 4

Development of the Spinal Cord

Answer 4

Nerulation ( starts at 3 weeks)

Question 5

Neruolation

Answer 5

Notochord, Neural Plate, Neruall fold, Neural tube( nerual crest)

Process where neural plate forms the nerual tube

Question 6

How do nerual folds form?

Answer 6

Lateral edges of neural plate become elavated

Question 7

Neural Groove

Answer 7

a depressed mid region

Question 8

Closure of cranial & caudal neuorpopre

Answer 8

25& 28

Question 9

Neural Crest cells break off of what?

Answer 9

Nerual plate (epithelial layer of deveolping dorsal neraul tube)

Question 10

What do the neural cells migrate to?

Answer 10

Mesenchymal cells

Question 11

WHere to crest cells travel to?

Answer 11

Dorsal root ganglion
ANS ganglian
Ganglia to CN V, VII, IX, X
Schwan cells
Meninges
Pigment cells
MS components of head

Question 12

Shwan cells are important in?

Answer 12

PNS

Question 13

Each Schwan cells develop

Answer 13

myelin

Question 14

Myelin are layers of what?

Answer 14

Layers of lipid and protein

Question 15

What does Myelin form?

Answer 15

Sheat around some axons

Question 16

What is myelin important for?

Answer 16

transmitting nervous impulse from neurons to neruon

Question 17

CNS Structure

Answer 17

1. Nucleus
   a. Gray Matter
   collection of NERVE CELL BODIEs
2. Tract
   a. White matter
   COllection of nerve fibers & connects nuclei

Question 18

PNS structure

Answer 18

1. Ganglion 
Collection of nerve cell bodies
Outside of CNS
2. Peripheral Nerve
- Collection of nerve fibers, connects cns with peripheral structures such as spinal cord or cranial

Question 19

Periphinal Spinal nerves

Answer 19

C1, C2, 3,4

Question 20

Axons are white or gray matter?

Answer 20

white

Question 21

Where can you find the cell bodies?

Answer 21

Nucleus, Gray matter

Question 22

The SPinal Cord is the extension of what?

Answer 22

Brainstem from medulla

Question 23

Where does the spinal cord end?

Answer 23

L1- L2

Question 24

Primary fucntion of the spinal cord is to

Answer 24

transmit signals to and from the brain to peripheral structures

Question 25

Dorsal & Ventral root meet to make what?

Answer 25

Spinal Nerve

Question 26

Cross Sectional Vartiation

Answer 26

C T S L

Question 27

Describe Cervical Cross section

Answer 27

Large & oval | Large amount of white matter

Question 28

Have the descending motor tract exit the cervical cross-sectional of the spinal cord?

Answer 28

No

Question 29

Describe Thoracic Cross Section

Answer 29

Oval Shap SMaller than cervical Have lateral horns - Autonomic

Question 30

Where are the cell bodies of the sympathetic nervous located?

Answer 30

thoracic

Question 31

Describe Lumbar Spine Cross Section

Answer 31

Round in shape & large | Largest amount of gray matter

Question 32

why is their large amount of gray matter?

Answer 32

because the surface area of muscles and sensory fibers

Question 33

Sacral Cross Section

Answer 33

Similar to lumbar but smaller

Question 34

Have most descending tracts left the Sscral cross section?

Answer 34

Yes

Question 35

Have ascending tracts ented the Spinal cored in sacral cross section?

Answer 35

Yes