In ‘heat conservation mode’ what have the precapillary sphincter muscles done?

Precapillary sphincters are the type of smooth muscles that adjust the flow of blood through the capillaries. These are the muscles, which help to regulate the blood flow when required.

It helps in conservation of heat, as when the hypothalamus of the brain senses that the temperature of the body is too high it sends a signal to dilate the blood vessels, which leads to a reduction in the flow of blood to body tissues, As a result of that less heat is lost.

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