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In addition to cold injuries, breathing cold air can cause dehydration, because the air is warmed to body temperature and humidified from body moisture. [15] There is also a higher risk of sunburn due to the reduced blocking of ultraviolet by the thinner atmosphere.
The first stage of cold water immersion syndrome, the cold shock response, includes a group of reflexes lasting under 5 min in laboratory volunteers and initiated by thermoreceptors sensing rapid skin cooling. Water has a thermal conductivity 25 times and a volume-specific heat capacity over 3000 times that of air; subsequently, surface cooling ...
Decompression sickness can occur after an exposure to increased pressure while breathing a gas with a metabolically inert component, then decompressing too fast for it to be harmlessly eliminated through respiration, or by decompression by an upward excursion from a condition of saturation by the inert breathing gas components, or by a ...
The reason we experience brain freeze after having cold food or drinks or breathing cold air is still under debate. Catherine Ham, a neurologist at VCU Health in Richmond, Va., tells Yahoo Life ...
When warm, wet air from the lungs is breathed out through the nose, the cold hygroscopic mucus in the cool and dry nose re-captures some of the warmth and moisture from that exhaled air. In very cold weather the re-captured water may cause a "dripping nose". Ideally, air is breathed first out and secondly in through the nose. [9]
The normal relaxed state of the lung and chest is partially empty. Further exhalation requires muscular work. Inhalation is an active process requiring work. [4] Some of this work is to overcome frictional resistance to flow, and part is used to deform elastic tissues, and is stored as potential energy, which is recovered during the passive process of exhalation, Tidal breathing is breathing ...
Cabin pressurization – Process to maintain internal air pressure in aircraft or spacecraft; Effects of high altitude on humans – Environmental effects on physiology and mental health; Mountaineering – Activity involving ascending mountains; Secondary polycythemia – Laboratory diagnosis of high hemoglobin content in blood
The disorders are caused by breathing gas at the high pressures encountered at the depth of the water and divers will often breathe a gas mixture different from air to mitigate these effects. Nitrox , which contains more oxygen and less nitrogen , is commonly used as a breathing gas to reduce the risk of decompression sickness at recreational ...
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