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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,...
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...
What is Homeostasis?01:16

What is Homeostasis?

Maintaining homeostasis requires that the body continuously maintain its internal conditions. Each physiological condition has a particular set point, from body temperature to blood pressure to levels of certain nutrients. A set point is the physiological value around which the normal range fluctuates. A normal range is a restricted set of values that is optimally healthful and stable. For example, the set point for normal human body temperature is approximately 37°C (98.6°F). Physiological...
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: Jul 12, 2026

Monitoring Colony-level Effects of Sublethal Pesticide Exposure on Honey Bees
10:35

Monitoring Colony-level Effects of Sublethal Pesticide Exposure on Honey Bees

Published on: November 15, 2017

Keeping a cool head: honeybee thermoregulation.

B Heinrich

    Science (New York, N.Y.)
    |September 21, 1979
    PubMed
    Summary

    Honeybees cool their heads using evaporative cooling of regurgitated honey at high temperatures. At low temperatures, they regulate thoracic temperature, passively heating the head.

    Area of Science:

    • Entomology
    • Animal Physiology
    • Thermoregulation

    Background:

    • Honeybees (Apis mellifera) face challenges maintaining stable body temperatures in varying ambient conditions.
    • Flight metabolism generates significant heat, posing a risk of overheating, especially at high temperatures.

    Purpose of the Study:

    • To investigate the thermoregulatory mechanisms employed by honeybees at high and low ambient temperatures.
    • To understand how honeybees manage head and thoracic temperatures during flight and stationary periods.

    Main Methods:

    • Observational study analyzing honeybee thermoregulation.
    • Focus on evaporative cooling, heat conduction, and blood flow.
    • Comparison of mechanisms at high (46°C) and low ambient temperatures.

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

    Published on: March 9, 2021

    Preparation of Single-cohort Colonies and Hormone Treatment of Worker Honeybees to Analyze Physiology Associated with Role and/or Endocrine System
    08:53

    Preparation of Single-cohort Colonies and Hormone Treatment of Worker Honeybees to Analyze Physiology Associated with Role and/or Endocrine System

    Published on: September 6, 2016

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    Last Updated: Jul 12, 2026

    Monitoring Colony-level Effects of Sublethal Pesticide Exposure on Honey Bees
    10:35

    Monitoring Colony-level Effects of Sublethal Pesticide Exposure on Honey Bees

    Published on: November 15, 2017

    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

    Preparation of Single-cohort Colonies and Hormone Treatment of Worker Honeybees to Analyze Physiology Associated with Role and/or Endocrine System
    08:53

    Preparation of Single-cohort Colonies and Hormone Treatment of Worker Honeybees to Analyze Physiology Associated with Role and/or Endocrine System

    Published on: September 6, 2016

    Main Results:

    • At high temperatures, honeybees use evaporative cooling of regurgitated honey to regulate head temperature.
    • Thoracic temperature is secondarily stabilized by heat flow from thorax to head via conduction and facilitated blood flow.
    • At low temperatures, honeybees prioritize thoracic temperature regulation, with passive head heating through conduction.

    Conclusions:

    • Honeybees possess sophisticated thermoregulatory strategies for both high and low ambient temperatures.
    • Evaporative cooling is crucial for head temperature control in hot conditions, enabling flight.
    • Passive conduction and thoracic regulation are key at low temperatures.