lect 2

Question 1

input and output from which system

Answer 1

peripheral nervous system

Question 2

input does what

Answer 2

AFFERENT,

Question 3

output does what

Answer 3

EFFerent

Question 4

neurons

Answer 4

excitable, transmittal signal

Question 5

axon hillock

Answer 5

where choices made on what action to take based on dendrite info

Question 6

neurons recieve info from where

Answer 6

dendrite

Question 7

Astrocyte

Answer 7

the support

ion homeostasis

Question 8

oligodendroglia

Answer 8

myelinationin CNS

can unsheathed multiple axons

Question 9

shwann cells

Answer 9

myelination in PSN

ensheath one axon

Question 10

hows excitable membrane different

Answer 10

selective permeability

Question 11

T/F ions more less concentration to more

Answer 11

F/S more concentration to less

Question 12

whens equilibrium

Answer 12

balance b/w concentration and electric gradient

Question 13

nest equation

Answer 13

equilibrium potential of K

Question 14

Goldman equation

Answer 14

permeability of each ion and concentration gradient

determines resting membrane potentail

Question 15

Steps in AP

Answer 15

NA channels open
NA influx
Max pos (Na close)
K Efflux
Undershoot

Question 16

active current

Answer 16

movement of ions through ion channels

Question 17

passive current

Answer 17

shutting charge

Question 18

voltage of AP determined by

Answer 18

active and passive current

Question 19

solutions to resistance of AP

Answer 19

increase axon diameter

Question 20

solution to capacitance

Answer 20

decrease axon diameter (prevents capacity from being reached)

Question 21

How are fast, show and medium myelinated and size

Answer 21

Fast - large - myelinated
slow - med - unmake
medium - small - myelinated

Question 22

Node of ranvior purpose

Answer 22

gaps where not myelinated

AP generated here

Question 23

is AP unidirectional

Answer 23

yes

Question 24

is AP binary

Answer 24

yes all or nothing

Question 25

how does AP encode information

Answer 25

temporal spatial summation (keeps hearing same thing thinks its important)

Question 26

5 things happenings at synapse

Answer 26

AP, CA opens, CA influx, open ION channels, AP

Question 27

is EPSP an AP

Answer 27

NOOOO

Question 28

most important neurotransmitter

Answer 28

glutamate

Question 29

what do excitatory postsynaptic potentials do

Answer 29

moe neuron closer to threshold

Question 30

what do inhibitory post synaptic potentials do

Answer 30

move neutron away from threshold

Question 31

where are neurotransmitter released

Answer 31

at chemical synapse

Question 32

T/F neurotransmitter can result in excitatory or inhibitory signal

Answer 32

true

Question 33

whats quickest and slowest

Answer 33

motor to skeletal mm slowest is Pain C