Which Statement Applies to Receptor Potentials

Question

Which statement applies to receptor potentials
A)They are usually repolarizations of receptors.
B)They are graded potentials.
C)They occur in neuronal cell bodies upon summation of presynaptic input.
D)They self-propagate along the efferent fibres.

Accepted Answer

Receptor potentials are graded potentials generated by sensory receptors in response to stimuli. They are not self-propagating along efferent fibers but rather act as a signal to trigger action potentials in the sensory neurons. They also do not occur in neuronal cell bodies upon summation of presynaptic input but rather are generated at the sensory receptor itself. While they can be depolarizations or hyperpolarizations depending on the receptor type and stimulus, they are not usually repolarizations of receptors.