The receptors for pain:
A) are free nerve endings called nociceptors.
B) may be stimulated by chemicals released by injured tissues.
C) respond to any type of stimulus if it is of sufficient intensity.
D) all of these choices

Question

Quizplus · Accepted Answer

All the statements are correct regarding pain receptors. Nociceptors are indeed free nerve endings that can be stimulated by chemicals released from injured tissues, and they can respond to various types of stimuli (mechanical, thermal, chemical) if the intensity is high enough to be considered potentially damaging.

The Receptors for Pain