Skin has cold and warm receptors {temperature sense} {temperature receptor}. Coolness and warmth are relative and depend on body-tissue relative average random molecule speed. Very cold objects can feel hot at first.
Nociceptive and thermal receptor systems interact. Tactile and thermal receptor systems interact. Warmth and coolness have no pressure.
Nose and tongue thermoreceptors adjust food-digestion enzymes.
Skin mechanoreceptors {thermoreceptor} can detect temperature. Muscles, tendons, joints, alimentary canal, and bladder have thermoreceptors.
Skin has mechanoreceptors {cold fiber} that detect decreased skin temperature. Skin is normally 30 C to 36 C. If objects are colder than 30 C, cold fibers provide information about material as heat flows from skin to object. Cold receptors are mostly on face and genitals. Cold fibers are 30 times more than warmth fibers.
Skin has receptors {warmth fiber} that detect increased skin temperature. Skin is normally 30 C to 36 C. If skin is above normal temperature, warmth fibers provide information about material as heat flows from skin to object. Warmth fibers also provide information about body state, such as fever or warm-weather overheating. Heat receptors are deep in skin, especially in tongue. Warm fibers are 30 times fewer than cool fibers.
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Date Modified: 2022.0225