L11- Nerve Impulse

Question 1

nerve impulse is ____ among neurons and cells of their control

Answer 1

communication

Question 2

nerve impulse originates

Answer 2

in response to a stimulus

Question 3

what natures of stimuli generate nerve impulses (4)

Answer 3

electrical, chemical, thermal, mechanical

Question 4

stimuli elicits a wave of

Answer 4

depolarization and repolarization

Question 5

depolarization/repolarization spreads across the

Answer 5

axolemma

Question 6

the relative electrical charges btwn two points in a field/circuit

Answer 6

potential

Question 7

charges inside and outside the neuron

Answer 7

transmembrane potential

Question 8

resting neuron membrane potential results from

Answer 8

unequal dist. of Na and K ions

Question 9

resting neuron potential keeps the concentraion of Na

Answer 9

low inside the membrane

Question 10

chemical/physical stimulation of a neuron increases

Answer 10

permeability of the membrane for Na

Question 11

The NaKATPase pump transports what ion out and what ion in

Answer 11

Na out, K in

Question 12

the NaKATPase pump keeps the concentration of ____ low ____ the membrane

Answer 12

Na, inside

Question 13

a resting neuron is _______inside and _______ outside

Answer 13

electronegative, electropositive

Question 14

neuron membrane is polarized at

Answer 14

70 millivolts (mV)

Question 15

during depolarization Na rushes ______

Answer 15

inward

Question 16

when Na rushes into the neuron how is the membrane affected

Answer 16

positive inside, negative outside

Question 17

when the inflow of Na stops what does the membrane do

Answer 17

increase permeability for K

Question 18

why does K go outward during repolarization

Answer 18

has a higher concentration inside the neuron

Question 19

what does the outflow of K achieve

Answer 19

restablished resting neuron potential

Question 20

what is the recovery phase during depolarization

Answer 20

hyper polarization/refractory phase

Question 21

what does larger axon diamete mean

Answer 21

faster signal conduction

Question 22

what is nonmyelinated transmission called

Answer 22

continuous conduction

Question 23

AP moves across the

Answer 23

neurolemma, soma, axon

Question 24

what is responsible for depolarizing adjacent axon membrane and generating further AP

Answer 24

local currents

Question 25

several neurons impinging one neuron is a

Answer 25

converging circuit

Question 26

axon of one neuron branching to impinge multiple neurons

Answer 26

diverging circuit

Question 27

each neuron sends a branch back to former neurons to generate a volley of impulses

Answer 27

reverberating circuit

Question 28

contains a number of neurons in a series, each supplying a branch to the final neuron

Answer 28

parallel circuit

Question 29

example of converging circuit

Answer 29

cerebellum receiving info from 4 regions

Question 30

example for diverging circuit

Answer 30

one neuron stimulating many muscle nuerons

Question 31

purpose of diverging circuit

Answer 31

amplifying a signal

Question 32

purpose of reverberating circuit

Answer 32

rhythmic activities like walking

Question 33

purpose of parallel circuit

Answer 33

reflex arcs

Question 34

which nerves are simple circuits

Answer 34

olfactory and optic

Question 35

what is a simple circuit

Answer 35

no more than 2 neurons