Chapter 7 review

Question 1

consists in the cns

Answer 1

brain and spinal cord

Question 2

What makes up the PNS

Answer 2

nerves outside the cns

Question 3

what are satelite cells

Answer 3

protect neuron cell bodies

Question 4

What are schwann cells

Answer 4

produce myelin sheath in PNS

Question 5

What are Oligodendrocytes

Answer 5

wrap their extensions around the nerve, form myelin sheath in the cns

Question 6

what is the function of microglia

Answer 6

dispose of debris - dead cells and bacteria

Question 7

what are ependymal

Answer 7

circulate cerebrospinal fluid in the cilia

Question 8

what are astrocytes

Answer 8

star-shaped, form barrier between capillaries and control chemical environment

Question 9

what do schwann cells do

Answer 9

produce myelin sheath

Question 10

what do nodes of ranvier do

Answer 10

gaps between myelin sheath

Question 11

what are the 2 parts neuron

Answer 11

cell body and processes

Question 12

what is nissle substance

Answer 12

specialzed rough endoplasmic reticulum

Question 13

what is neurofibrils

Answer 13

intermediate cytoskeleton that mainatins cell shape

Question 14

what are bundles of fibers that are found in the CNS called

Answer 14

tracts

Question 15

What are bundles of fibers that are found in PNS called

Answer 15

nerves

Question 16

Ganglia

Answer 16

collections of cell bodies outside the central nervous system

Question 17

gray matter

Answer 17

outer layer; unmyelinated fibers and cell bodies

Question 18

white matter

Answer 18

myelinated fibers, found in gray matter

Question 19

what are efferent

Answer 19

travels away from cns

Question 20

what are afferent

Answer 20

travels away from stimulus to cns

Question 21

what are inter

Answer 21

connect sensory and motor neurons

Question 22

multipolar

Answer 22

many extensions from cell body

Question 23

bipolar

Answer 23

one extension and one cell body

Question 24

unipolar

Answer 24

single short process leaving the cell body

Question 25

ratio sodium/potassium

Answer 25

3/2

Question 26

action potential is _______________

Answer 26

all or nothing

Question 27

At rest the membrane is

Answer 27

polarized

Question 28

action potential causes the membrane to be

Answer 28

depolarized

Question 29

sequence of action potential

Answer 29

membrane becomes depolarized, sodium rushes in, potassium rushes out, sodium potassium pump replaces it, can’t go again until goes all the way through

Question 30

synaptic cleft

Answer 30

gap between adjacent neurons

Question 31

synapse

Answer 31

junction between nerves

Question 32

2 main functions of neurons

Answer 32

irritability and conductivity

Question 33

irritability

Answer 33

ability to respond to stimulus

Question 34

conductivity

Answer 34

the ability to transmit a message

Question 35

what are the 3 parts of the brainstem

Answer 35

medullary oblogata, pons, midbrain

Question 36

stroke

Answer 36

brain clots in the brain

Question 37

heart attack

Answer 37

blood clots in the heart

Question 38

temporal

Answer 38

auditory and encoding memory

Question 39

parietal

Answer 39

controls senses

Question 40

frontal

Answer 40

higher level thinking, voluntary movement

Question 41

occipital

Answer 41

visual, color

Question 42

pons

Answer 42

controls breathing

Question 43

cerebral spinal fluid

Answer 43

shock absorber