Which of the following statements concerning the properties of action potentials is TRUE?
A. The rate of propagation of an action potential down an axon is independent of stimulus strength.
B. Action potentials can undergo summation.
C. A supra-threshold stimulus can stimulate an action potential during the absolute refractory period.
D. Action potentials generally propagate from the axon terminal toward the initial segment.
E. Increasing the size of a stimulus will increase the amplitude of an action potential.
A
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