相关实验视频
Updated: Jun 27, 2025

07:56
Measuring Skeletal Muscle Thermogenesis in Mice and Rats
Published on: July 27, 2022
2.9K
与男性相比,女性的热中性区域发生"北极"转移
Robert J Brychta1, Suzanne McGehee1, Shan Huang1
1Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD 20892.
概括
女性表现出比男性更低的临界温度,这表明"北极"的温度调节转变. 这种差异主要是由于女性的体脂绝缘度较高,超过了代谢率变化.
科学领域:
- 人类生理学 人类生理学
- 热调节 热调节 热调节
- 环境适应环境适应
背景情况:
- 社会的看法表明,女性比男性感觉更冷.
- 对比基于性别的温度调节的受控研究是有限的.
- 温度调节现象类型可以分为"北极"到"热带"的频谱.
研究的目的:
- 量化比较健康的年轻女性和男性的温度调节反应.
- 为了研究性别对温度调节参数的影响,例如较低的临界温度.
- 确定人类温度调节中基于性别的差异的主要驱动因素.
主要方法:
- 在一系列环境温度 (1731°C) 中测量生理反应.
- 应用舒兰德模型来确定较低的临界温度.
- 评估二次温度调节措施,包括棕色脂肪组织活动和皮肤温度.
主要成果:
- 与男性 (22.9°C) 相比,女性的临界温度较低 (21.9°C) 显著降低.
- 这种女性的"北极"转变是由于身体脂肪的绝缘性更强,抵消了较低的基础代谢率.
- 在棕色脂肪组织活动,肌肉活动,皮肤温度或寒冷诱导的热生成方面没有观察到基于性别的显著差异.
结论:
- 人体温度调节的个体差异受到身体尺寸和组成等物理属性的显著影响.
- 身体组成的性别差异,特别是身体脂肪,在温度调节表态中起着关键作用.
- 虽然女性表现出"北极"的温度调节特征,但其他的生理温度调节指标并没有显示出基于性别的显著差异.
相关概念视频
Factors Affecting Body Temperature
4.1K
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:
Factors may include:
4.1K
Body Temperature
948
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...
948
Thermoregulation
978
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,...
978
Mechanism of heat transfer
1.2K
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...
1.2K
Requirements for Human Life
8.1K
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...
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...
8.1K
Menopause
156
Menopause, a natural biological process marking the end of a woman's fertility, typically occurs between the fifth and sixth decade of life. This phase is characterized by the exhaustion of the ovarian follicle pool, leading to less responsive ovaries despite the high levels of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). The consequential decrease in estrogen production results in symptoms like hot flashes, heavy sweating, headaches, hair loss, muscle pains, vaginal...
156

