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Related Concept Videos

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...
Factors Affecting Body Temperature01:28

Factors Affecting Body Temperature

As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
Factors may  include:
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,...
Requirements for Human Life01:26

Requirements for Human Life

The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also require a specific range of temperature and pressure that the Earth and its atmosphere provides.
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
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...

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Related Experiment Video

Updated: Jun 25, 2026

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions
07:54

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions

Published on: March 9, 2021

Ethnicity and temperature regulation.

Michael I Lambert1, Theresa Mann, Jonathan P Dugas

  • 1MRC/UCT Research Unit of Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Newlands, South Africa.

Medicine and Sport Science
|February 12, 2009
PubMed
Summary
This summary is machine-generated.

Human populations exhibit clear physical adaptations to diverse global climates. While environmental factors influence traits, genetic differences related to climate adaptation are increasingly being identified.

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Area of Science:

  • Human adaptation
  • Environmental science
  • Genetics

Background:

  • Global climate diversity creates distinct environmental zones.
  • Human populations have adapted lifestyles to these varied climatic conditions.
  • Observable phenotypic differences exist between populations in different climates.

Purpose of the Study:

  • To explore the interplay between climate, human physiology, and genetics.
  • To investigate the genetic basis of climate-driven adaptations.
  • To understand how environmental factors influence human morphology and physiology.

Main Methods:

  • Comparative analysis of human populations across diverse climatic zones.
  • Review of existing literature on climate-induced physiological and morphological changes.
  • Examination of gene expression data related to heat and cold exposure.

Main Results:

  • Climate significantly influences human characteristics like birth weight, body shape, and skin color.
  • Phenotypic differences are evident, but genotypic distinctions are harder to ascertain.
  • Over 50 genes show altered expression with heat exposure, and over 20 with cold exposure.

Conclusions:

  • Environmental and lifestyle factors contribute to human physiological and morphological variations.
  • Genetic origins for more human adaptations to climate are expected as research progresses.
  • Further research is needed to fully elucidate the genotypic underpinnings of climate adaptation.