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


E.  I, II, and III

Biology & Microbiology

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