Chapter 12: electrophysiology of neurons; electrical potentials and current

Question 1

What is an electrical potential?

Answer 1

a difference in the concentration of charged particles between one point and another. It is a form of potential energy that under the right circumstances can produce a current

Question 2

What is an electrical current?

Answer 2

a flow of charged particles from one point to another

Question 3

electrical potentials and currents

Answer 3

Question 4

resting membrane potential

Answer 4

Question 5

resting membrane potential diagram

Answer 5

Question 6

sodium potassium pump

Answer 6

Question 7

local potential diagram

Answer 7

Question 8

local potentials

Answer 8

Question 9

local potential vs action potentials comparison

Answer 9

Question 10

local potentials graded, decremental, reversible, excitatory or inhibitory, hyperpolarize

Answer 10

Question 11

Action potential

Answer 11

a more dramatic change produce a membrane. Occur only where there is a high enough density of voltage-gated channels

Question 12

action potential diagram

Answer 12

Question 13

action potential process

Answer 13

action potential process

Question 14

actions of the sodium and potassium channels during an action potential

Question 15

action potential graded

Answer 15

Question 16

refractory period: absolute refractory period and relative refractory period

Question 17

refractory period diagram

Question 18

length of refractory periods

Question 19

continuous conduction of a nerve signal in an unmyelinated fiber diagram. refers to continuous conduction in unmyelinated fibers

Question 20

What is a nerve signal

Answer 20

a traveling wave of excitation produced by self propagating action potentials

Question 21

saltatory conduction

Answer 21

the way that myelinated fibers conduct signals. It means leaping or jumping. Th

Question 22

saltatory conduction of a nerve signal diagram