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

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

5 The nerve impulse is an electrical current that travels along dendrites or axons.
A) True
B) False

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Medical English DR.DUY – anhvanyds

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