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WorksheetsAction Potential Review
Total questions: 17
Worksheet time: 18mins
Action potentials run along the ______ from ______ to ________.
axon, dendrites, axon terminals
axon, axon terminals, dendrites
dendrites, axon, axon terminals
axon terminals, axon, dendrites
Which of the following is involved in maintaining the resting membrane potential of neurons?
Na+/K+ ATPase pump moves 3Na+ in for every 2K+ out
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 3K+ out for every 2Na+ in
At resting membrane potential, neurons have more (a) on the outside of the cell membrane.
At resting membrane potential, neurons have more (a) on the inside of the cell membrane.
The sodium potassium pump restores the resting membrane potential. By which process does this occur?
Osmosis
Diffusion
Facilitated diffusion
Active transport
hyperpolarization
depolarization
repolarization
polarization
Which number on the graph represents the threshold potential?
1
2
3
4
6
When the membrane potential reaches +30mV, ________ channels open, ________ occurs, and ________ channels close.
sodium, depolarization, potassium
potassium, depoloarization, sodium
sodium, repolarization, potassium
postassium, repolarization, sodium
An electrical impulse within a single neuron is called a
synapse
membrane potential
action potential
cell body
When is the potassium channel open?
during rest only
during repolarization only
during depolarization only
all the time
Reorder the following (starting at beginning)
Resting potential (-70mV), stimulus received
Na+ gates open, threshold reached (-55 mV)
Na+ gates open
Na+ moves into the axon
Action potential reached (+30mV)
Reorder the following (starting at the action potential)
Action potential reached (+30mV)
Na+ inactivation gates close, K+ gates open
K+ exits the cell, repolarization
K+ still open, goes below -70 mV, hyperpolarization
Na/K pump restores to resting potential
