相关实验视频
Updated: Jun 7, 2025

08:22
A Preclinical Model of Exertional Heat Stroke in Mice
Published on: July 1, 2021
3.7K
用7天的热度适应量化最大皮肤湿度变化的时间进程
Grant P Lynch1, Yorgi Mavros1, Ollie Jay1
1Thermal Ergonomics Laboratory, Heat and Health Research Centre, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.
Journal of applied physiology (Bethesda, Md. : 1985)
|November 19, 2024
概括
皮肤最大湿度 (ωmax) 在热度适应后的7天内显著增加,由更活跃的汗腺驱动. 这些变化发生得很快,在第3天出现了显著的增加,为热应激适应提供了新的见解.
科学领域:
- 运动生理学 运动生理学
- 环境生理学环境生理学
- 热调节 热调节 热调节
背景情况:
- 热适应可以提高身体应对热压力的能力.
- 皮肤最大湿度 (ωmax) 是热应激反应的关键指标.
- 了解适应过程中 ωmax 变化的时间过程对于优化热暴露策略至关重要.
研究的目的:
- 为量化皮肤最大湿度 (ωmax) 在连续七天热度适应的变化.
- 确定驱动 ωmax.这些变化的生理机制.
- 提供关于 ωmax 在早期热适应过程中的动态进展的新数据.
主要方法:
- 9名成年人接受了为期7天的热度适应方案.
- 在第1,3,5和第7天使用湿度 (RAMP) 协议来评估 ωmax.
- 测量包括食道温度,全身出汗率 (WBSR),局部出汗率和激活的汗腺密度 (ASGD).
主要成果:
- ωmax从第1天到第7天显著增加 (0.68到0.87).
- 早在第3天就观察到 ωmax 的显著增加.
- 全身出汗率和激活的汗腺密度增加,而汗腺产量保持不变.
结论:
- 皮肤最大湿度 (ωmax) 在7天的热适应期内显著增加.
- 增加 ωmax 的主要机制是更多的激活汗腺数量,而不是每个腺体的产量增加.
- 这些发现为热适应过程中 ωmax 的动态变化提供了新的见解.
相关概念视频
Adaptations that Reduce Water Loss
25.1K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.1K
Body Temperature
912
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...
912
Responses to Heat and Cold Stress
13.4K
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.
13.4K
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
Mechanisms of Heat Transfer
267
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...
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...
267

