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Related Concept Videos

Thermoregulation01:26

Thermoregulation

The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
Regulation of Food Intake01:30

Regulation of Food Intake

Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
Body Temperature01:25

Body Temperature

The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
Body Temperature01:07

Body Temperature

Body temperature reflects the equilibrium between heat production and heat loss within the body. Most heat is generated by metabolically active tissues, particularly the liver, heart, brain, kidneys, and endocrine organs. At rest, skeletal muscles contribute 20–30% of total heat production, but during vigorous exercise, this can increase up to 30–40 times.
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C (97–99°F), remaining relatively stable...
Homeostatic Imbalances in Body Temperature01:19

Homeostatic Imbalances in Body Temperature

Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...
Thermosensation01:43

Thermosensation

Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...

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Related Experiment Video

Updated: Jun 12, 2026

Measuring Skeletal Muscle Thermogenesis in Mice and Rats
07:56

Measuring Skeletal Muscle Thermogenesis in Mice and Rats

Published on: July 27, 2022

Thermoregulation, energy balance, regulatory peptides: recent developments.

Miklos Szekely1, Erika Petervari, Marta Balasko

  • 1Department of Pathophysiology and Gerontology, Medical School, University of Pecs, Hungary. miklos.szekely@aok.pte.hu

Frontiers in Bioscience (Scholar Edition)
|June 3, 2010
PubMed
Summary

Body energy balance involves hypothalamic and brainstem nuclei regulating temperature and weight. Neuropeptides, both central and peripheral, significantly influence these functions, impacting food intake and metabolic rate.

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Area of Science:

  • Neuroscience
  • Endocrinology
  • Metabolism

Background:

  • Body energy balance is regulated by hypothalamic and brainstem nuclei.
  • This regulation involves a complex interplay between thermoregulation and body weight control.
  • Central and peripheral neuropeptides play crucial roles in modulating these processes.

Purpose of the Study:

  • To elucidate the roles of central and peripheral neuropeptides in energy balance.
  • To understand how these peptides influence food intake, metabolic rate, and thermoregulation.
  • To explore factors that may modify peptide activity in energy regulation.

Main Methods:

  • Review of existing literature on hypothalamic and brainstem nuclei function.
  • Analysis of the effects of central anabolic and catabolic neuropeptides.
  • Examination of the influence of peripheral peptides (leptin, insulin, ghrelin).

Main Results:

  • Central anabolic neuropeptides (e.g., neuropeptide Y) increase food intake and decrease metabolic rate, potentially causing hypothermia.
  • Central catabolic neuropeptides (e.g., melanocortins) suppress food intake and increase energy expenditure, potentially inducing hyperthermia.
  • Peripheral peptides and factors like aging can modulate central peptide activity.

Conclusions:

  • Energy balance is a complex neuroendocrine process involving multiple interacting systems.
  • Neuropeptides are key regulators of feeding behavior, metabolism, and body temperature.
  • Thermoregulatory status, nutritional signals, and aging influence the efficacy of these regulatory peptides.