When the interval between the stimuli decreases, _______.
A) a second action potential is generated until the interval reaches the absolute refractory period
B) a second action potential is generated as long as the stimulus is above threshold
C) a second action potential is generated until the interval reaches the relative refractory period
D) a second action potential is generated regardless of the stimulus and the interval
Answer: A) a second action potential is generated until the interval reaches the absolute refractory period
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