Neurons convey information about the strength of stimuli by varying:
Correct answer: C. the rate at which they fire action potentials
- A. the size of their action potentials
- B. the velocity of their action potentials
- C. the rate at which they fire action potentials
- D. all of the above
Explanation
A neuron's action potential is essentially all-or-none, so stronger stimuli do not make each impulse larger. Instead, stimulus strength is represented mainly by increasing the rate or frequency of action potentials.
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