The thermogenesis intervenes when the temperature of the body is lower than the not instruction (temperature in the neighborhoods of 37°C). That involves the release in the blood of Catécholamine S (Adrénaline), which will involve a Vasoconstriction on the level of the skin. The body will seek to produce heat by:

• Muscular activity: thermal volunteer or shivers

• metabolism: catecholamines, thyroid hormones
• Lipolysis of brown fat fabric (brown grease is present only in the infants and disappears gradually with the safe age in the rodents)

At the time of thermogenesis, there is vasoconstriction of the vessels, which helps to maintain the temperature central. To think that alcohol reheating is a belief unfortunately too spread, in particular at SDF. The problem is whereas alcohol gives a vasodilatation of the vessels, that is to say an increase in thermolysis, which causes to plunge the subject in hypothermia.

Thermal shivers

The thermal shivers are tremors of the skeletal striated muscles. This shiver constitutes for the organization its independent source of thermogenesis. It is an emergency mechanism.

Vegetable thermogenesis

Thermogenesis is not clean only with the warm-blooded animals. It is also present in various plants, particularly at the Araceae, and was discovered by Jean-Baptiste Lamarck in 1777. This thermogenesis can generate a temperature of almost 40° above that ambient. It is started by the secretion of a molecule, the calorigene , découvete in 1937 by Adriaan Van Herk, and is identified with the Salicylic acid in 1987.

It seems to exist, strictly speaking, of Thermorégulation in the vegetable world, no control mechanism of the loss of heat not having been identified.

This thermogenesis is primarily at the level of the bodies of flowering and could be an adaptive advantage to raise the chances of pollination by attracting certain insects.

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