Lauren Lit
Sodium Potassium Pump Quiz Results
Your Results: Sodium-Potassium Exchange Pump (Quiz 1)
The correct answer for each question is indicated by a
1
CORRECT
.
The sodium-potassium pump functions to pump
A)sodium ions out of the cell and potassium ions into the cell.
B)sodium ions into the cell and potassium ions out of the cell.
C)sodium and potassium ions into the cell.
D)sodium and potassium ions out of the cell.
E)sodium and potassium ions in both directions across the cell membrane.
2
CORRECT
What is the source of energy used to power the sodium-potassium pump?
A)breakdown of ATP
B)formation of ATP
C)transport of ATP by the pump
D)breakdown of GTP
E)transport of GTP by the pump
3
CORRECT
During one cycle, the sodium-potassium pump binds and moves.
A)1 Na+ and 2 K+.
B)2 Na+ and 2 K+.
C)2 Na+ and 3 K+.
D)3 Na+ and 2 K+.
E)3 Na+ and 3 K+.
4
CORRECT
The sodium-potassium pump is a trans-membrane protein.
A)True
B)False
5
INCORRECT
The binding and release of sodium or potassium ions are due to conformational
changes in the protein.
A)True
B)False
Your Results: Quiz 2 – sodium Potassium
The correct answer for each question is indicated by a
1
CORRECT
.
Which of the following statements are not true about the sodium
potassium pump?
A)The ions from the intracellular fluid plus an ATP molecule bind to
the carrier protein on the inside of the cell membrane.
B)ATP is broken down into ADP and potassium to supply the energy.
C)The carrier protein changes shape as it transports ions from the
intracellular fluid to the extracellular fluid.
D)The ions from inside the cell are transported across the cell
membrane.
E)The ions are then released into the extracellular fluid.
2
CORRECT
Which of the following statements are not true about the sodium
potassium pump?
A)After releasing ions into the extracellular fluid, the carrier protein
exhibits a new conformation.
B)With this new conformation, the carrier protein can now bind to
different ions in the extracellular fluid.
C)The ions in the extracellular fluid bind to the carrier protein, and
the potassium attached to the carrier protein is released.
D)The carrier protein then changes shape again.
E)The ions from the extracellular fluid are then transported across
the cell membrane to the inside of the cell.
3
INCORRECT
The sodium potassium exchange pump is an example of...
A)diffusion.
B)facilitated diffusion.
C)active transport.
D)osmosis.
E)filtration.
4
CORRECT
The sodium potassium exchange pump moves three potassium ions out of
the cell and two sodium ions into the cell with each cycle.
A)True
B)False
5
CORRECT
Active transport moves substances from an area of high concentration to
an area of low concentration of that substance.
A)True
B)False
Your Results: QUIZ 3: Sodium Potassium
The correct answer for each question is indicated by a
1
CORRECT
.
The sodium-potassium pump functions to pump
A)sodium ions out of the cell and potassium ions into the cell.
B)sodium ions into the cell and potassium ions out of the cell.
C)sodium and potassium ions into the cell.
D)sodium and potassium ions out of the cell.
E)sodium and potassium ions in both directions across the cell
membrane.
2
CORRECT
What is the source of energy used to power the sodium-potassium pump?
A)breakdown of ATP
B)formation of ATP
C)transport of ATP by the pump
D)breakdown of GTP
E)transport of GTP by the pump
3
CORRECT
During one cycle, the sodium-potassium pump binds and moves.
A)1 Na+ and 2 K+.
B)2 Na+ and 2 K+.
C)2 Na+ and 3 K+.
D)3 Na+ and 2 K+.
E)3 Na+ and 3 K+.
4
INCORRECT
The sodium-potassium pump is a trans-membrane protein.
A)True
B)False
5
INCORRECT
The binding and release of sodium or potassium ions are due to
conformational changes in the protein.
A)True
B)False
Your Results: Chemical Synapse 1
The correct answer for each question is indicated by a
1
CORRECT
.
An action potential arriving at the presynaptic terminal causes...
A)sodium ions to diffuse into the cell.
B)sodium ions to diffuse out of the cell.
C)calcium ions to diffuse into the cell.
D)acetylcholine to diffuse into the cell.
E)ligand-gated sodium channels to open.
2
CORRECT
As a result of question number one...
A)synaptic vessels migrate to the plasma membrane and release
acetylcholine.
B)acetylcholine is actively transported from the pre-synaptic neuron.
C)acetylcholine is actively transported to the post synaptic neuron.
D)ligand-gated sodium channels open.
E)sodium ions diffuse into the cell.
3
CORRECT
Acetylcholine has which effect on the post-synaptic neuron?
A)Ligand gated calcium channels open and calcium diffuses in.
B)Ligand gated sodium channels open and sodium diffuses in.
C)Terminal vessels migrate to the plasma membrane.
D)Voltage gated calcium ion channels open and calcium diffuses in.
E)Voltage gated sodium ion channels open and sodium diffuses in.
4
CORRECT
If the post-synaptic membrane potential reaches threshold level, an action
potential will be produced.
A)True
B)False
5
CORRECT
Acetylcholine is actively transported from the pre-synaptic membrane to the
post - synaptic membrane.
A)True
B)False
Your Results: Chemical Synapse 2
The correct answer for each question is indicated by a
1
CORRECT
.
An action potential arriving at the presynaptic terminal causes...
A)voltage-gated sodium ion channels to open, and sodium ions to
diffuse into the cell.
B)voltage-gated sodium ion channels to open, and sodium ions to
diffuse out of the cell.
C)voltage-gated calcium ion channels to open, and calcium ions to
diffuse into the cell.
D)acetylcholine to diffuse into the cell.
E)ligand-gated sodium channels to open, and sodium ions to diffuse
out of the cell.
2
INCORRECT
As a result of question number one...
A)synaptic vessels migrate to the plasma membrane and release
acetylcholine.
B)acetylcholine is actively transported from the pre-synaptic neuron.
C)acetylcholine is actively transported to the post synaptic neuron.
D)ligand-gated sodium channels open.
E)sodium ions diffuse into the cell.
3
CORRECT
Acetylcholine has which effect on the post-synaptic neuron?
A)Ligand gated calcium ion channels open and calcium diffuses in.
B)Ligand gated sodium ion channels open and sodium diffuses in.
C)Terminal vessels migrate to the plasma membrane.
D)Voltage gated calcium ion channels open and calcium diffuses in.
E)Voltage gated sodium ion channels open and sodium diffuses in.
4
CORRECT
If the post-synaptic membrane potential reaches threshold level, an action
potential will be produced.
A)True
B)False
5
CORRECT
Acetylcholine is actively transported from the pre-synaptic membrane to
the post-synaptic membrane.
A)True
B)False
Your Results:The nerve Impulse
The correct answer for each question is indicated by a
1
CORRECT
.
Which of the following statements about the resting membrane potential is
TRUE?
A)the exterior of the cell has a net negative charge and the interior
has a net positive charge
B)the exterior of the cell has a net negative charge and the interior is
neutral
C)the exterior of the cell has a net positive charge and the interior
has a net negative charge
D)the exterior of the cell has a net positive charge and the interior is
neutral
E)the exterior of the cell is neutral and the interior has a net negative
charge
2
CORRECT
During depolarization, which of the following statements about voltagegated ion channels is TRUE
A)K+ gates open before Na+ gates
B)Na+ gates open before K+ gates
C)Na+ and K+ gates open at the same time
D)Na+ gates open while K+ gates remain closed
E)K+ gates open while Na+ gates remain closed
3
CORRECT
Depolarization occurs because
A)more K+ diffuse into the cell than Na+ diffuse out of
B)more K+ diffuse out of the cell than Na+ diffuse into it
C)more Na+ diffuse into the cell than K+ diffuse out of it
D)more Na+ diffuse out of the cell than K+ diffuse into it
E)both Na+ and K+ diffuse into the cell
4
CORRECT
The sodium-potassium pump is involved in establishing the resting
membrane potential.
A)True
B)False
5
INCORRECT
The nerve impulse is an electrical current that travels along dendrites or
axons.
A)True
B)False
Your Results: Transmission across a membrane
The correct answer for each question is indicated by a
1
CORRECT
.
The primary neurotransmitter at the neuromuscular junction is
A)dopamine.
B)adrenaline.
C)acetylcholine.
D)histamine.
E)serotonin.
2
INCORRECT
Arrange the following in the proper order in which they occur at the presynaptic side of a neuromuscular junction.
1. Calcium ions are released
2. Action potential arrives at the presynaptic terminal
3. Neurotransmitter is released
A)1, 2, 3
B)2, 1, 3
C)2, 3, 1
D)3, 2, 1
E)3, 1, 2
3
INCORRECT
Arrange the following in the proper order in which they occur at the postsynaptic side of a neuromuscular junction.
1. Action potential is propagated over the muscle cell membrane
2. Depolarization of the post-synaptic membrane
3. Sodium ions move into muscle cell
A)1, 2, 3
B)2, 1, 3
C)2, 3, 1
D)3, 2, 1
E)3, 1, 2
4
CORRECT
The area between the pre-synaptic nerve cell and the post-synaptic
muscle cell is termed the synaptic cleft.
A)True
B)False
5
CORRECT
Receptors that bind the neurotransmitter at the post-synaptic cell
membrane are voltage-gated.
A)True
B)False
Your Results: voltage-gated channels and action potential 1
The correct answer for each question is indicated by a
1
CORRECT
.
Depolarization occurs because...
A)potassium ions continue to diffuse out of the cell after the inactivation
gates of the voltage-gated sodium ion channels begin to close.
B)the extra efflux of potassium ions causes the membrane potential to
become slightly more positive than the resting value.
C)the increased potassium ion permeability lasts slightly longer than the
time required to bring the membrane potential back to its resting
level.
D)more sodium ions diffuse into the cell than potassium ions diffuse out
of it.
E)the inactivation gates of the voltage-gated sodium ion channels begin
to open and the diffusion of sodium ions decreases.
2
CORRECT
Repolarization occurs because...
A)potassium ions continue to diffuse out of the cell after the inactivation
gates of the voltage-gated sodium ion channels begin to close.
B)the extra efflux of potassium ions causes the membrane potential to
become slightly more positive than the resting value.
C)the increased potassium ion permeability lasts slightly longer than the
time required to bring the membrane potential back to its resting
level.
D)more sodium ions diffuse into the cell than potassium ions diffuse out
of it.
E)the inactivation gates of the voltage-gated sodium ion channels begin
to open and the diffusion of sodium ions decreases.
3
CORRECT
Hyperpolarization, or afterpotential occurs because...
A)potassium ions continue to diffuse out of the cell after the inactivation
gates of the voltage-gated sodium ion channels begin to close.
B)the extra efflux of potassium ions causes the membrane potential to
become slightly more positive than the resting value.
C)the increased potassium ion permeability lasts slightly longer than the
time required to bring the membrane potential back to its resting
level.
D)more sodium ions diffuse into the cell than potassium ions diffuse out
of it.
E)the inactivation gates of the voltage-gated sodium ion channels begin
to open and the diffusion of sodium ions decreases.
4
CORRECT
After the passage of the action potential, the sodium-potassium pump
reestablishes the resting membrane potential.
A)True
B)False
5
CORRECT
The sodium-potassium pump uses bulk transport to move the sodium and
potassium ions.
A)True
B)False
Your Results: Gated Channels 2
The correct answer for each question is indicated by a
.
1
CORRECT
At resting membrane potential, which of the following statements about the
voltage-gated sodium ion (Na+) channels is TRUE?
A)activation gates are closed and inactivation gates are open
B)activation gates are open and inactivation gates are closed
C)activation and inactivation gates are open
D)activation and inactivation gates are closed
E)activation and inactivation gates alternate between open and closed
2
CORRECT
During depolarization, which of the following statements about voltage-gated
ion channels is TRUE?
A)K+ gates open before Na+ gates
B)Na+ gates open before K+ gates
C)Na+ and K+ gates open at the same time
D)Na+ gates open while K+ gates remain closed
E)K+ gates open while Na+ gates remain closed
3
CORRECT
Depolarization occurs because
A)more K+ diffuse into the cell than Na+ diffuse out of it.
B)more K+ diffuse out of the cell than Na+ diffuse into it.
C)more Na+ diffuse into the cell than K+ diffuse out of it.
D)more Na+ diffuse out of the cell than K+ diffuse into it.
E)both Na+ and K+ diffuse into the cell.
4
CORRECT
The sodium-potassium pump is involved in establishing the resting
membrane potential.
A)True
B)False
5
CORRECT
The voltage-gated potassium channels close before the membrane potential
is brought back to its resting level.
A)True
B)False
Your Results: Action Potential 1
The correct answer for each question is indicated by a
1
CORRECT
.
An action potential
A)prevents the neuron cell membrane from altering its charge.
B)causes the inside of the neuron cell membrane to become positive
and the outside negative.
C)causes the inside of the neuron cell membrane to become positive
and the outside neutral.
D)causes the outside of the neuron cell membrane to become
positive and the inside negative.
E)causes the outside of the neuron cell membrane to become
positive and the inside neutral.
2
CORRECT
An action potential generates local currents that tend to ________ the
membrane immediately adjacent to the action potential.
A)depolarize
B)repolarize
C)hyperpolarize
D)stabilize
E)neutralize
3
INCORRECT
The absolute refractory period is the period of time during which
A)a second action potential cannot be generated.
B)a second action potential is generated.
C)the action potential ceases.
D)the action potential decreases in magnitude.
E)the action potential changes direction.
4
CORRECT
Action potential propagation occurs in both directions along the axon.
A)True
B)False
5
CORRECT
Threshold is the minimum current required for the cell membrane to
generate an action potential.
A)True
B)False
Your Results: Action Potential 2
The correct answer for each question is indicated by a
1
INCORRECT
.
An action potential...
A)causes the neuron cell membrane to become unable to alter its
charge.
B)causes the outside of the neuron cell membrane to become
positively charged in reference to the inside.
C)causes the inside of the neuron cell membrane to become
positively charged in reference to the outside.
D)causes the inside of the neuron cell membrane to become
negatively charged in reference to the outside.
E)causes the inside of the neuron cell membrane to become neutrally
charged in reference to the outside.
2
INCORRECT
An action potential generates local currents that tend to _____ the
membrane immediately adjacent to the action potential.
A)depolarize
B)repolarize
C)hyperpolarize
D)stabilize
E)neutralize
3
CORRECT
Absolute refractory period causes...
A)action potential propagation to cease
B)action potential propagation to begin
C)action potential propagation to increase
D)action potential propagation to occur in both directions
E)action potential propagation to occur in one direction
4
CORRECT
Action potentials can travel in both directions on the axon.
A)True
B)False
5
CORRECT
Threshold is the minimum current required for the cell membrane to
generate an action potential.
A)True
B)False