Which of the following statements accurately describe events that occur as a result of a local potential reaching threshold?
A. K+ channels begin to close.
B. Activation gates of Na+ channels begin to close.
C. A positive feedback cycle develops in which depolarization causes activation gates of Na+ channels to open.
D. Inactivation gates of Na+ channels begin to open.
E. Both "Inactivation gates of Na+ channels begin to open" and "A positive feedback cycle develops in which depolarization causes activation gates of Na+ channels to open" are correct.
Answer: C
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