Sensory receptors for pain are_______________?
Correct answer: B. Free nerve endings
- A. Pacinian corpuscles
- B. Free nerve endings
- C. End bulbs of Krause
- D. End organs of Ruffini
Explanation
Pain receptors are free nerve endings, usually carried by A-delta or C fibres and activated by damaging mechanical, thermal, or chemical stimuli. Pacinian and Ruffini endings are mechanoreceptors for pressure or stretch rather than pain.
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