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Related Concept Videos

Thermoregulation01:26

Thermoregulation

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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,...
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Body Temperature01:25

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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...
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Body Temperature01:07

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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...
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Thermosensation01:43

Thermosensation

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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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Homeostatic Imbalances in Body Temperature01:19

Homeostatic Imbalances in Body Temperature

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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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Osmoregulation in Insects01:47

Osmoregulation in Insects

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Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
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Related Experiment Video

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

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Collective thermoregulation in bee clusters.

Samuel A Ocko1, L Mahadevan

  • 1Department of Physics, Massachusetts Institute of Technology, , Cambridge, Massachusetts 02139, USA.

Journal of the Royal Society, Interface
|December 17, 2013
PubMed
Summary
This summary is machine-generated.

Honeybee swarms self-regulate temperature by acting as active porous structures. Variations in density create a "behavioural pressure" that controls heat, enabling survival in diverse environments.

Keywords:
active porous mediahoneybeesswarmsthermoregulation

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Tactile Conditioning And Movement Analysis Of Antennal Sampling Strategies In Honey Bees Apis mellifera L.
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Area of Science:

  • Animal Behavior
  • Biophysics
  • Thermoregulation

Background:

  • Honeybee swarms form dense clusters for survival, actively maintaining core temperature without central control.
  • The swarm cluster's ability to adapt to environmental conditions suggests a sophisticated thermoregulation mechanism.

Purpose of the Study:

  • To model honeybee swarm thermoregulation as an active porous structure.
  • To investigate the role of 'behavioural pressure' in swarm temperature control.
  • To explain observed cluster behaviors like vertical asymmetry and temperature resilience.

Main Methods:

  • Developed a continuum model using advection-diffusion equations for heat transfer in a mobile porous medium.
  • Simulated heat transfer dynamics within the swarm cluster under varying ambient temperatures.

Main Results:

  • Demonstrated that 'behavioural pressure,' driven by density variations, effectively regulates swarm core temperature.
  • Explained vertical asymmetry as a result of buoyancy-driven flows.
  • Showed the cluster's capacity for overpacking at low temperatures and stability at high temperatures.

Conclusions:

  • Honeybee swarm clusters function as active porous media, utilizing 'behavioural pressure' for efficient thermoregulation.
  • The model explains key swarm behaviors and offers insights into biomimetic thermoregulation strategies.