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Voltage-Gated Channels and the Action Potential (Quiz 2)

View the animation below, then complete the quiz to test your knowledge of the concept.






1At 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



2During 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



3Depolarization 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.



4The sodium-potassium pump is involved in establishing the resting membrane potential.
A)True
B)False



5The voltage-gated potassium channels close before the membrane potential is brought back to its resting level.
A)True
B)False







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