What is Thermoregulation?

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Temperature Regulation Definition

To support the core temperature the body applies the arrangement of the thermal control. The fixed limit is vital for the steady state and the state of equilibrium. There are limits of the healthy internal temperature. The baseline temperature ranges from 98°F (37°C) to 100°F (37.8°C). Some kind of variability is normal and physiologic. Try not to reach the extremeness of the core temperature to let the body work properly.

If your temperature lowers below 95°F (35°C), you will suffer from supercooling. This state threatens with the heart arrest, inconvertible brain damage, or even death. If the internal temperature reaches 107.6°F (42°), you will get dead faint, cerebral damage or even death.

Cool or warm weather, the speed of the wind, the air wetness and even your clothing has an impact on your core temperature.

Causes that are rising your internal temperature include:

  • Intensive growth;
  • Puberty;
  • Hormonal contraceptives;
  • Infectious diseases;
  • Burns;
  • HIV;
  • Endocrine dysfunction;
  • Cancer.

Factors that result in the drop of the core temp. include:

  • Arterial hypotension;
  • Frostbite;
  • Endocrine pathologies;
  • Intoxication;
  • Low immune function;
  • Anaemia;
  • Longtime fasting;
  • Alcohol and drugs.

What Organ Regulates Body Temperature?

A moderate-size section of the nervous nuclei known as hypothalamus launches and manages all mechanisms of thermotaxis. It signals the CNS, endocrine glands, organ systems and vessels, skeleton muscles when the core temperature goes out-of-range. There are several approaches to return the baseline temperature to average.

How Can The Homeostasis Be Improved?

When the internal temperature goes out-of-range special sensory receptors react and message to the hypothalamus. Hot and cold thermoreceptors are detected in the hypothalamus itself, in the formation reticularis and the spinal cord. In retaliation, hypothalamus commands the organ systems to feedback in several ways.

If you need to cool down, these ways include:

  • Vascular distention: in hot conditions your skin capillaries get widened. The blood streams away from the warm core to the coldest area. This way allows your body to release warm through radiation.
  • Sweating: the water contained in sweat released by the perspiratory glands evaporates and chills the skin. This lowers your inner temperature.

To get you warm the body adjusts in such ways:

  • Vascular constriction: the volume of heat loss is determined by the capacity of blood getting to the surface; to maintain heat blood inflows to the skin. The opening of the capillaries collapses and the volume of blood getting to the skin drops. It streams to the heart, brain, and kidneys to maintain their performance and keep warm.
  • Hormonal adjustment. In cold conditions lipolysis in the adipose tissue is stimulated through norepinephrine. Free fatty acids are released with the formation of a large amount of heat. Norepinephrine and adrenaline cause a rapid but short overshoot in heat generation. More prolonged enhancement of metabolic processes is achieved under the influence of thyroid hormones thyroxine and triiodothyronine.
  • Perspiration. Cold air cur the respiration rate, but increases the depth of it. The inspiration slows down in comparison with the expiration to reduce heat loss.
  • Trembling.

How Do The Muscles Help In Thermoregulation?

If you feel cold and need badly to get warm, you begin to move. Muscle contractions give much heat. Tremors are involuntary contractions of muscles. It begins with the neck and head but consequentially spreads to the masticatory muscles causing teeth to knock and shaking the whole body. Trembling intensify heat production up to 5 times.

The Key-Note

Somatic temperature below 77 °F (25°C) and above 109.4°F (43°C) is fatal. Your body will take measures to adjust inner temperature if it gets over the edge. It is the human thermoregulation definition. Thermotaxis makes homeostasis possible and allows escaping from probable life-threatening such as cardiac stroke, hypothermia, and brain damage.


  1. King, James R., and Donald S. Farner. “Energy metabolism, thermoregulation and body temperature.” Biology and comparative physiology of birds 2 (1961): 215-288.
  2. Huey, Raymond B., and Montgomery Slatkin. “Cost and benefits of lizard thermoregulation.” The Quarterly Review of Biology 51.3 (1976): 363-384.
  3. Sawka, MICHAEL N. “Physiological consequences of hypohydration: exercise performance and thermoregulation.” Medicine and science in sports and exercise 24.6 (1992): 657-670.

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