What is it called? Special sensory neurons in the skin and other tissues of the body. It translates certain stimuli into action potentials that are then transmitted to more central parts of the nervous system.
A. Nociceptors B. Astrocytes C. Receptors D. Oligodendroglia
Nociceptors-there are four kinds of nociceptors:
thermal nociceptors are sensitive to high or low temperatures.
mechanical nociceptors respond to strong pressure to the skin that comes with cuts and blows. these receptors respond quickly, and often trigger protective reflexes!
chemical nociceptors respond to a variety of chemicals released with tissue damage, as well as to external chemicals such as capsaicin (the chemical that makes hot peppers hot) and spider venom.
polymodal nociceptors can be excited by strong pressure, by heat or cold, and by chemical stimulation as well.
silent (or sleeping) nociceptors stay quiet - hence the name - but become more sensitive to stimulation when they are surrounded by inflammation.