Which of the following statements concerning receptors is correct?
a. the larger the receptor potential, the greater the frequency of action potentials initiated in the afferent neuron.
b. tonic receptors often exhibit an "off-response."
c. phasic receptors are important in situations where maintained information about a stimulus is valuable.
d. receptor adaptation results from nerve fatigue.
e. receptors are part of efferent neurons.
A
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