psychology chapter 3 pt 1

Question 1

depolarization

Answer 1

sodium out potassium in

increases chance of action potential

Question 2

resting potential

Answer 2

charge of aprox -75 millivolts

Question 3

membrane channels

Answer 3

movement of ions through ‘channels’ in cell membrane

Question 4

ion

Answer 4

atom or molecule with unbalanced electrical charge

Question 5

resulting potential

Answer 5

result of ‘stable’ ionic imbalance

Question 6

cell membrane

Answer 6

surrounds neuron

Question 7

axon terminal

Answer 7

end of axon

contains vesicles

Question 8

axon

Answer 8

transmit signals it receives from the cell body to other neurons
electrical signal

Question 9

dendrite

Answer 9

close contact with the neurons

receives info

Question 10

cell body

Answer 10

structure
make neurotransmitters
activity and survival of the neuron

Question 11

neurons

Answer 11

transmitter of information

Question 12

glia

Answer 12

support

physical support, supply nutrients, remove waste, insulating neurons

Question 13

drugs mimic neurotransmitters

Answer 13

benzodiazepines

Question 14

synapse

Answer 14

connecting with other neurons

Question 15

saltatory conduction

Answer 15

the nerve impulse jumps from node to node

Question 16

nerve impulse

Answer 16

movement of the action potential along the length of the axon

Question 17

node of ranvier

Answer 17

point between glial cells where the cell membrane is exposed
allows for conduction of the electrical impulse

Question 18

relative refractory period

Answer 18

greater than normal stimulus will cause the cell to fire

Question 19

action potential

Answer 19

no electrical charges between neurons
increases the permeability of the membrane to sodium
rapid changes in the membrane potential

Question 20

absolute refractory period

Answer 20

no amount of stimulation will cause the cell to fire

Question 21

agonist vs antagonist

Answer 21

mimics action of a neurotransmitter
vs
blocks the action of a neurotransmitter

Question 22

neural pathways

Answer 22

neurotransmitters can be differentiated from one another on the basis of distribution in the brain and body
can influence a range of behaviours