Answer:
B. Nociceptors
Explanation:
<u>Nociceptors are sensory neurons also known as "pain receptors" because they enable the body to detect the sensation of pain</u>. These structures function by detecting the chemical signals released from a damaged tissue.
Nociceptors can be either external or internal. In humans, the external nociceptors are found in skin, mucosa, and corneas; whereas internal nociceptors are found in the joints, muscles, gut, bladder, and the digestive tract.
Moreover, there are different types of nociceptors according to their function. They can be <em>chemical, thermal, mechanical, silent, and polymodal.</em>
