Which of the following characteristics are true for an action potential?I A threshold potential must be exceeded for an action potential to occur.II A stimulus either produces a full action potential or none at all.III During the refractory period it is less likely that stimuli can produce another action potential.

A. II and III
B. I and III
C. I and II
D. I, II, and III
E. I only


Answer: D

Biology & Microbiology

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