Increasing excitatory signals above the threshold for neural activation will not affect the intensity of an action potential. This indicates that a neuron's reaction is
A) inhibited by the myelin sheath.
B) delayed by the refractory period.
C) an all-or-none response.
D) dependent on neurotransmitter molecules.
E) primarily electrical rather than chemical.
Answer: C) an all-or-none response.
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