Is our skin an accurate reader of heat?

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I mean that if we dip our hands in cold water and after sometime suddenly take them out and put them in hot water does our skin feel the water to be hot or cold?(I hope it is correct or meaningful)!

Sangeetha Pulapaka

I would say the skin is not always an accurate reader of heat because the skin takes some time to get used to the particular temperature. I did not physically do this, but I assume if I keep my hands in cold water until my fingers are cold enough and if I immediately dip my fingers in hot water - I wouldn't feel the heat immediately.

The perception of cold begins when nerves in the skin send impulses to the brain about skin temperature. These impulses respond not only to the temperature of the skin, but also to the rate of change in skin temperature.

Impulses from the skin arrive at the hypothalamus, a brain area responsible for controlling the internal environment of the body, which generates instructions in the nervous system that prevent a drop in body core temperature.

Nervous impulses sent to muscles generate extra metabolic heat through shivering. Blood vessels that would otherwise transport warm blood from the internal organs to the cold skin, where the blood would lose heat, constrict, constraining most blood, and its heat, to the internal organs.

Have you ever wondered why some people feel less cold than others?t’s actually general body size, rather than fat, that correlates with how warm you can keep. Because we generate heat within and lose it from the surface, the body mass-to-skin ratio comes into play, with bigger people generating more heat while losing less.