Which of the following is not a type of mechanoreceptor?A) Merkel receptors (SA1 fiber)B) Ruffini cylinder (SA2 fiber)C) Meissner corpuscle (RA1 fiber)D) Nociceptors (RA2 or PC fiber)E) Pacinian corpuscle (RA2 or PC fiber)
Question
Which of the following is not a type of mechanoreceptor?A) Merkel receptors (SA1 fiber)B) Ruffini cylinder (SA2 fiber)C) Meissner corpuscle (RA1 fiber)D) Nociceptors (RA2 or PC fiber)E) Pacinian corpuscle (RA2 or PC fiber)
Solution
The correct answer is D) Nociceptors (RA2 or PC fiber). Nociceptors are not a type of mechanoreceptor. They are a type of pain receptor that respond to harmful or potentially harmful stimuli. On the other hand, Merkel receptors, Ruffini cylinders, Meissner corpuscles, and Pacinian corpuscles are all types of mechanoreceptors, which are sensory receptors that respond to mechanical pressure or distortion.
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