Sensory nerves communicate the strength of a stimulus by
a. the magnitude of the voltage change across the membrane during the action potential.
b. the speed at which the action potentials are transmitted down the axon.
c. the number of action potentials transmitted down the axon.
d. a and b.
e. a and c.
C; Action potentials are of constant magnitude and travel at constant speed (choices a and b). The number of potentials, coupled with the number of neurons sending potentials, communicates the strength of a stimulus.
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