To simplify sensory receptor classification, why might it make senseto eliminate nociceptors as a distinct class?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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To simplify sensory receptor classification, why might it make sense
to eliminate nociceptors as a distinct class?

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Nociceptors are the sensory receptors that respond to threat stimuli. They are also called pain receptors because they sense any threat to the body and then alarm the brain and spinal cord. They are free nerve endings of a sensory neuron, and they are found in every tissue. When the electric current generated by the neurons reaches above the threshold value, nociceptors get activated and send signals to the central nervous system.

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