Lab on Da Spine

Question 1

Axon functions

Answer 1

to send instructions in the form of action potentials

Question 2

what does the axon lack, what does it have instead

Answer 2

lacks nissl bodies
has neurofibrils

Question 3

what is the name of the point of an axon where it spilts to 2

Answer 3

axon collateral

Question 4

beginning of axon is called what

Answer 4

axon hillock

Question 5

what are the spaces between schwann cells

Answer 5

nodes of ranvier

Question 6

where are ions able to cross in a nerve cell

Answer 6

nodes of ranvier

Question 7

where is action potential generated

Answer 7

in the nodes of ranvier

Question 8

list how apinal nerves are ordered

Answer 8

C1-C8 cervical nerves
T1-T12 thoracic nerves
L1-L5 lumbar nerves
S1-S5 sacral nerves
Co1 coccygeal nerves

Question 9

what are the 4 nerval plexi

Answer 9

cervical
brachial
lumbar
sacralw

Question 10

what are the two spinal enlargements

Answer 10

cervical and lumbar

Question 11

what do enlargements correspons to

Answer 11

limb innervations

Question 12

what are plexi

Answer 12

interlacing networks of nerves

Question 13

conus medularis def

Answer 13

tapered end of spinal cord
ends at t1

Question 14

cauda equina def

Answer 14

collection of L1-Co1 spinal nerves

Question 15

filum terminale def

Answer 15

strand of ct that anchors spinal cord to coccyx longitudinally

Question 16

what are the 4 meniges of CT covering the CNS

Answer 16

deep most
Pia mater
Arachnoid mater
Subarachnoid space
Dura mater
Superficial

Question 17

Denticulate ligaments def

Answer 17

CT strand that anchors spinal cord on sides and limits twisting movement

Question 18

epidural space def

Answer 18

between dura mater and bone that is packed with fat tissue

Question 19

dorsal root ganglion def

Answer 19

bump that contains cel bodies of sensory neurons

Question 20

ventral gray horn is wider or narrower than the dorsal grey horn

Answer 20

wider

Question 21

what neurons are in the dorsal horn

Answer 21

sensory

Question 22

what neurons are in the ventral horm

Answer 22

motor

Question 23

what neurons are in the lateral horn

Answer 23

motor neurons

Question 24

what does the vental horm innervate

Answer 24

skeletal muscle

Question 25

what does the laterla horn innervate

Answer 25

visceral organs

Question 26

which meniges has CSF

Answer 26

subarachnoid space

Question 27

what meninges are loose ct

Answer 27

pia meter and arachnoid mater

Question 28

what meniges are dense irregular ct

Answer 28

dura mater

Question 29

does white matter or gray matter have completed circles

Answer 29

white matter