what kind of receptors detect pain, warmth, and cold?
Thermoreceptors: Warm and Cold Fibers. Our ability to detect temperature changes originates from two types of specialized receptors called thermoreceptors. Similar to pain receptors, these link to free nerve endings and are specific for both warm and cold stimuli.
Receptors which respond primarily to injurious or painful stimulation are called nociceptors. Within this general category are four subgroups: mechanonociceptors, mechano-heat nociceptors, mechano-cold nociceptors, and poly modal nociceptors. Nociceptors are found in skin, muscles, joints, and the viscera.