Zoology 10th Edition by Stephen Miller,John Harley

Exercise 19

Most sensory receptors have the following features: (a) Sensory receptor cells create graded potentials. (b) Their structure is specific for a given stimulus. (c) The nerve impulse from the receptor goes to the CNS along a specific pathway. (d) The CNS translates the message into a sensation.
Explain this statement: "all receptors are transducers."