probably important stuff

Question 1

what is the resting membrane potential mostly due to

Answer 1

k

Question 2

what is resting membrane potential equal to

Answer 2

-70

Question 3

what is a somatic sense

Answer 3

sensation in skin and limbs (ie temp)

Question 4

enteric division

Answer 4

a part of te digestive tract - can act on its own

Question 5

what carry electrical signals

Answer 5

neurons

Question 6

whats the control centre of a neuron

Answer 6

cell body (soma)

Question 7

whats the sensing region

Answer 7

dentrites

Question 8

where are interneourons locted

Answer 8

entirely within CNS

Question 9

which nerves have both effereant and afferent properties

Answer 9

spinal nerves

Question 10

anterograde

Answer 10

forward

Question 11

retrograde

Answer 11

backwards

Question 12

fast axonal transport

Answer 12

membrane bound proteins or organeeles

Question 13

slow axonal transport

Answer 13

cytoplasmic proteins and cytoskeleton proteins

Question 14

is there retrograde movement in slow axonal transport

Answer 14

no

Question 15

what drives the walking of proteins along filaments

Answer 15

ATP hydrolysis

Question 16

CNS glia (4)

Answer 16

ependymal
astrocytes
microglia
oligodentricyte

Question 17

PNS glia

Answer 17

shwaan cells and satellite cells

Question 18

myelin forming glia

Answer 18

CNS oligodendrocytes
PNS schwaan cells

Question 19

satelliote glia cell

Answer 19

`they dont surround the axon they just sit beside it

Question 20

ependymal cells

Answer 20

line the walls of the brain and spinal cord

Question 21

what help in PNS regen

Answer 21

shwaan cells

Question 22

where do graded potentials occur

Answer 22

dendrites and soma

Question 23

where do action occur

Answer 23

axon hillic and axon terminals

Question 24

where is the trigger zone

Answer 24

axon hillock

Question 25

depolarization of what to generste an AP

Answer 25

-55

Question 26

inactivation gates vs activation gates

Answer 26

they are slow and are open at rest
fast and closed at rest

Question 27

tonality depends on what solutes

Answer 27

non penetrating

Question 28

is there ever regeneration on graded potentials

Answer 28

no

Question 29

can an action potential be summed

Answer 29

no

Question 30

what happens during the refractory period

Answer 30

two signals too close together in time cannot sum

Question 31

what is the rule during absolute refractory period

Answer 31

a second AP cannot be regenerated q

Question 32

what happens during relative refractory period

Answer 32

a second ap can be initiated but require a larger than normal depolarizing stimulus

Question 33

what ions are in action potentials in neurons

Answer 33

Na and K

Question 34

what does the refractory period prevent

Answer 34

backwards conduction

Question 35

where do voltage gated channels exist in myelinated axons

Answer 35

regions of bare axon that cannot be covered by myelin

Question 36

saltatory conduction

Answer 36

conduct from node to node

Question 37

what do nodes of ranvier contain

Answer 37

abundance of Na channels

Question 38

why is conduction faster in myelinated axons

Answer 38

they skip sections (saltatory conduction)

Question 39

whats faster, electrical or chemical synapse

Answer 39

electrical

Question 40

is there a refractory period on graded potentials

Answer 40

no