2.6 Lundy Ch. 2 (2)

Question 1

depolarization

Answer 1

potential becomes less negative than RMP

Question 2

depolarization is ____

Answer 2

excitatory

Question 3

hyperpolarization is ____

Answer 3

inhibitory

Question 4

hyperpolarization

Answer 4

potential becomes more negative than RMP

Question 5

modulation

Answer 5

• gradual

- longer lasting changes in membrane potential

Question 6

local potential

Answer 6

• initial change in membrane potential

- only spreads a short distance

Question 7

action potential

Answer 7

• brief, large depolarization that is repeatedly regenerated along an axon
• spreads long distances

Question 8

sequence of events in generating an action potential

Answer 8

1. deformation of receptor
2. change in LMP
3. development of action potential in axon
4. NT binds to ligand gated receptor on postsynaptic membrane
5. synaptic potential in postsynaptic membrane

Question 9

local potentials classified as

Answer 9

• receptor potentials

- synaptic potentials

Question 10

local potentials are spread this way

Answer 10

passively

Question 11

local potentials: amplitude

Answer 11

• small

- graded

Question 12

most local receptor potentials are ______

Answer 12

depolarizing (excitatory)

*some can be hyperpolarizing

Question 13

local synaptic potentials are generated in

Answer 13

• motor neurons

- interneurons

Question 14

What stimulates local synaptic potentials?

Answer 14

other neurons

Question 15

local potentials: ion channel responsible for change in potential

local receptor potentials

Answer 15

modality gated channels

Question 16

local potentials: ion channel responsible for change in potential

local synaptic potentials

Answer 16

ligand gated channels

Question 17

With local potentials, what happens to amplitude?

Answer 17

decreases with distance traveled

Question 18

How are significant changes in potential created from local potentials?

Answer 18

• temporal summation

- spatial summation

Question 19

temporal summation

Answer 19

combined effect of small potential changes

Question 20

spatial summation

Answer 20

local potentials generated in different regions of the neuron are added together for a combined effect

Question 21

What determines what happens in the neuron?

Answer 21

net change in potential