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2.1.4: Action Potentials
By Nicole Gary
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Last updated 4 months ago
16 questions
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Question 1
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Question 2
2.
Question 3
3.
Question 4
4.
The sodium potassium pump restores the resting potential. By which process does this work?
active transport
facilitated diffusion
osmosis
diffusion
What is the normal resting potential of a neuron cell membrane?
-30mV
+55mV
-70mV
+40mV
Question 7
7.
Question 8
8.
Question 9
9.
Action potentials run along the ______ from ______ to ________.
axon, axon terminals, dendrites
axon terminals, axon, dendrites
axon, dendrites, axon terminals
dendrites, axon, axon terminals
An action potential is __________ in nature, with the inside of the neuron being more ________.
chemical, negative
electrical, negative
chemical, positive
electrical, positive
As the neuron fires, there's a reversal in _____ as the axon undergoes ________.
direction, repolarization
direction, depolarization
charge, depolarization
charge, repolarization
When is the potassium channel open?
during depolarization only
during repolarization only
during rest only
all the time
At what stage are both ions present in large concentrations INSIDE the neuron?
Depolarizarion
Hyperpolarization
Resting Potential
Repolarization
The sodium-potassium pump....
Sends (Na+) into the cell
Sends (K+) into the cell
Exchanges (K+) & (Na+) during depolarization
Exchanges (K+) & (Na+) during hyperpolarization
Which
one
of the following is involved in maintaining a resting membrane potential?
Na+/K+ ATPase pump moves 3K+ out for every 2Na+ in
Na+/K+ ATPase pump moves 3K+ in for every 2Na+ out
Na+/K+ ATPase pump moves 3Na+ out for every 2K+ in
Na+/K+ ATPase pump moves 3Na+ in for every 2K+ out
What is this?
electrical channel
potassium ion channel
sodium ion channel
sodium-potassium pump
What is this strucure?
axon
cell membrane
cell body
dendrites
What is this structure?
sodium potassium pump
electric channel
sodium ion channel
potassium ion channel
What is this structure?
potassium ion channel
electric channel
sodium potassium pump
sodium ion channel
At which point on the diagram does depolarization of the axon occur?
A
B
C
D
When a membrane potential reaches +30mV, ________ channels open, ________ occurs, and ________ channels close.
sodium, repolarization, potassium
potassium; repolarization; sodium
Potassium, depoloarization, sodium
Sodium, depolarization, potassium
What letter on the graph represents the Hyperpolarization phase?
B
D
E
A
