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相关概念视频

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...
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:
Increased Body Temperature01:25

Increased Body Temperature

A body temperature above  38°C  (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in response to an infection or illness.
Metabolic Rate01:25

Metabolic Rate

The human body is a powerhouse of energy, with every cell performing numerous functions that require energy. This energy production and consumption is measured by the metabolic rate, which quantifies the total heat generated by all the body's chemical reactions and mechanical work. This measurement helps to determine the rate of kilocalorie (kcal) consumption needed to fuel all ongoing activities.
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence the...
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...
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,...

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相关实验视频

Updated: Jul 11, 2026

Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue
06:28

Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue

Published on: October 7, 2014

棕色脂肪:在蝙蝠的冬眠中唤醒时产生热能效应.

R L SMALLEY, R L DRYER

    Science (New York, N.Y.)
    |June 21, 1963
    PubMed
    概括

    冬眠蝙蝠 (Eptesicus fuscus) 的棕色脂肪在兴奋期间明显比其他组织更温暖. 这表明棕色脂肪组织在冬眠哺乳动物的热量产生中起着关键作用.

    科学领域:

    • 哺乳动物生理学 哺乳动物生理学
    • 冬眠生物学 冬眠生物学
    • 热生成是一种热生成.

    背景情况:

    • 冬眠包括长时间的代谢抑制和低体温.
    • 从冬眠中唤醒需要大量的能量消耗来重新温暖身体.
    • 棕色脂肪组织 (BAT) 以其在非发热生成中的作用而闻名.

    研究的目的:

    • 为了研究棕色脂肪在蝙蝠冬眠时的唤醒过程中的热性质.
    • 为了确定棕色脂肪对冬眠哺乳动物热量产生的贡献.

    主要方法:

    • 温度测量是在蝙蝠Eptesicus fuscus的棕色脂肪和其他组织中进行的.
    • 数据是在从冬眠中唤醒的后期阶段收集的.

    主要成果:

    • 观察到棕色脂肪的温度大约比其他组织高3摄氏度.
    • 这种温度差异在从冬眠中唤醒的后期阶段被注意到.

    结论:

    • 棕色脂肪在从冬眠中唤醒时表现出升高的温度.
    • 棕色脂肪产生的热量似乎是冬眠哺乳动物的一个关键功能.
    关键词:
    在ADIPOSE组织中添加.身体温度的调节冬季国家 (Hibernation) 是一种冬季国家.

    更多相关视频

    Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans
    04:54

    Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans

    Published on: June 2, 2023

    Infrared Thermography for the Detection of Changes in Brown Adipose Tissue Activity
    08:16

    Infrared Thermography for the Detection of Changes in Brown Adipose Tissue Activity

    Published on: September 28, 2022

    相关实验视频

    Last Updated: Jul 11, 2026

    Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue
    06:28

    Cerenkov Luminescence Imaging of Interscapular Brown Adipose Tissue

    Published on: October 7, 2014

    Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans
    04:54

    Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans

    Published on: June 2, 2023

    Infrared Thermography for the Detection of Changes in Brown Adipose Tissue Activity
    08:16

    Infrared Thermography for the Detection of Changes in Brown Adipose Tissue Activity

    Published on: September 28, 2022