1 L4 Local Potentials

Question 1

Local potential features

Answer 1

Decremental - Graded - Localized - Small - Summation capability - Either Depolarizing or Hyperpolarizing

Question 2

Decremental- local potential

Answer 2

Decrease in size with distance away from initiation site (e.g. bell shaped curve)

Question 3

Graded- local potential

Answer 3

Vary in size and duration depending on size and duration of stimulus

Question 4

Localized- local potential

Answer 4

Occur close to site of initiation but do not actively get conducted away from that site

Question 5

Small- Local potential

Answer 5

Usually a few mV

Question 6

What 2 forms can local potentials be

Answer 6

Depolarisation and Hyperpolarization

Question 7

True or False- Local potentials are capable of summation

Answer 7

True

Question 8

What are the names for the spread of charge in a local potential

Answer 8

Passive or Electronic

Question 9

What does PSP stand for

Answer 9

Post Synaptic Potential

Question 10

What are the 2 types of summation for local potentials

Answer 10

Temporal and Spacial

Question 11

Describe temporal summation

Answer 11

If they occur close together in time

Question 12

Describe spatial summation

Answer 12

If they arrive in close physical proximity

Question 13

What are the 4 neutron types

Answer 13

Unipolar - Bipolar - Multipolar - Anaxonic

Question 14

Where do local potentials arise

Answer 14

Receptive structures at nerve endings of primary sensory unipolar neurons

Question 15

2 pairs for local potentials

Answer 15

Excitatory - Depolarizing -
Inhibitory - Hyperpolarizing