Chapter 36 - Chapter 36: Environmental Emergencies...

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Chapter 36: Environmental Emergencies Environmental emergency - a medical condition caused or exacerbated by the weather, terrain, atmospheric pressure, or other local factors. Homeostasis - the natural tendency of the body to maintain a steady and normal internal environmental. Thermal gradient - the difference in temperature between the environment and the body. Thermogenesis - the production of heat, especially within the body. Heat Loss Conduction - moving electrons, ions, heat, or sound waves through a conductor or conducting medium. Convection - transfer of heat via currents in liquids or gases. Radiation - transfer of energy through space or matter. Evaporation - change from liquid to a gaseous state Respiration - the exchange of gases between a living organism and its environment. Thermoregulation - the maintenance or regulation of a particular temperature of the body. Core Temperature - the body temperature of the deep tissues, which usually does not vary more than a degree or so from its normal 37˚C (98.6˚F). Hypothalamus - portion of the diencephalons producing neurosecretions important in the control of certain metabolic activities, including body temperature regulation. Negative feedback - homeostatic mechanism in which a change in a variable ultimately inhibits the process that led to the shift. Basal metabolic rate - rate at which the body consumes energy just to maintain stability; the basic metabolic rate of an awake, relaxed person 12-14hours after eating and at a comfortable temperature. Exertional metabolic rate - rate at which the body consumes energy during activity. It is faster than basic metabolic rate. Temperture Emergencies Heat illness - increased core body temperature due to inadequate thermolysis. Dehydration often goes hand in hand w/heat disorders. Hyperthermia
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Chapter 36 - Chapter 36: Environmental Emergencies...

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