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相关概念视频

Body Temperature01:25

Body Temperature

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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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Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

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In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
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Mechanisms of Heat Transfer01:14

Mechanisms of Heat Transfer

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Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
377
Mechanism of heat transfer01:19

Mechanism of heat transfer

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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...
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Mechanisms of Heat Transfer I01:14

Mechanisms of Heat Transfer I

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Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
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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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相关实验视频

Updated: Jul 24, 2025

Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
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Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management

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热量与心脏的关系

Yash Desai1, Haitham Khraishah2, Barrak Alahmad3,4,5

  • 1Department of Internal Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.

The Yale journal of biology and medicine
|July 3, 2023
PubMed
概括

极端的高温显著影响心脏健康,恶化心血管疾病,如心脏病发作和中风. 更多的研究对于理解热量至关重要.

关键词:
在CVD中,CVD是非常重要的.气候变化 气候变化 气候变化热浪 热浪 热浪 热浪热的温度 热的温度 热的温度心血管疾病的心血管疾病

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Cooling or Warming the Esophagus to Reduce Esophageal Injury During Left Atrial Ablation in the Treatment of Atrial Fibrillation
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The Use of the Patch-Clamp Technique to Study the Thermogenic Capacity of Mitochondria
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The Use of the Patch-Clamp Technique to Study the Thermogenic Capacity of Mitochondria
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科学领域:

  • 心脏病学 心脏病学
  • 环境健康 环境健康
  • 公共卫生 公共卫生

背景情况:

  • 心血管疾病是全球主要的死亡原因.
  • 极端的高温对心血管健康构成重大风险,特别是对于具有先前疾病的人来说.

研究的目的:

  • 审查暴露于热量和主要心血管疾病之间的关系.
  • 探索热量对心脏不利影响背后的生理机制.

主要方法:

  • 流行病学研究的文献综述.
  • 对高温的生理反应的分析.

主要成果:

  • 暴露于热量与缺血性心脏病,中风,心力衰竭和心律失常的风险增加有关.
  • 对热的生理反应包括脱水,代谢需求增加,高凝血,电解质失衡和全身炎症,使心脏疲劳.

结论:

  • 了解热量和心血管疾病之间的联系机制需要进一步的研究.
  • 需要临床指导方针来管理炎热事件期间的心血管疾病,强调医疗保健专业人员在应对气候变化对健康的影响中的作用.