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関連する概念動画

Thermoregulation01:26

Thermoregulation

859
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,...
859
Thermosensation01:43

Thermosensation

30.3K
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...
30.3K
Body Temperature01:25

Body Temperature

858
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...
858
Decreased Body Temperature01:29

Decreased Body Temperature

599
A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
599
Mechanism of heat transfer01:19

Mechanism of heat transfer

1.1K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.1K
Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

13.3K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.3K

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関連する実験動画

Updated: May 23, 2025

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice
08:35

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice

Published on: March 17, 2015

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冷たい記憶は全身の温度調節反応を制御する

Andrea Muñoz Zamora1,2, Aaron Douglas1,2, Paul B Conway1,2

  • 1School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland.

Nature
|April 24, 2025
PubMed
まとめ
この要約は機械生成です。

寒い環境を記憶する訓練を受けたマウスは 再び被曝すると代謝が増加し 寒い記憶が生理学的反応を誘発することを示しました この研究は 脳が体温を維持するために 記憶をどのように使っているかを明らかにしています

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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

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Strategies for Study of Neuroprotection from Cold-preconditioning
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Strategies for Study of Neuroprotection from Cold-preconditioning

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関連する実験動画

Last Updated: May 23, 2025

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice
08:35

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice

Published on: March 17, 2015

14.7K
Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions
07:54

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

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科学分野:

  • 神経科学
  • 生理学
  • 行動科学

背景:

  • 脳は体温を維持するために 周囲の熱的課題に対する 自律的および行動的反応を調整します
  • 温度情報を保存し,取り出し,生理学的反応に変換する正確なメカニズムは不明です.

研究 の 目的:

  • 熱的挑戦の記憶が 全身の代謝を制御できるかどうかを調べるため
  • 熱記憶の取り出しに関与する 神経経路と熱調節への影響を探る

主な方法:

  • マウスにおける熱調節性パブロヴィアン・コンディショニングを活用し,特定の文脈と冷たい挑戦 (4°C) を関連付けました.
  • 精密な操作と神経活動のモニタリングのためのエングラム・ラベリング技術,光遺伝学,および化学遺伝学を使用しています.
  • メモリーリコールと寒さへの曝露で測定されたマウスの代謝率と下垂体活性.

主要な成果:

  • マウスは,現在の環境温度に関係なく,以前に経験した寒い環境に戻ったときに,代謝率を増加させました.
  • 特定のニューラルネットワークが ヒポカンプスと下垂体の間にあることが 冷たい記憶を 呼び出す過程で確認されました
  • 寒さに対する生理学的反応を模倣し 記憶の回復に不可欠でした

結論:

  • 冷たい記憶を回収すると 熱的恒常性を維持するのに役立つ 自律的および行動的反応が始まります
  • この研究は,記憶のリコールと全身代謝の温度調節の間の直接的な関連性を示しています.
  • この発見は ヒポカンプス・ヒポタラマスのネットワークが 熱記憶を処理し 反応する役割を強調しています