Physiology 1021 Study Guide - Final Guide: Dysmetria, Aortic Valve, Osmosis
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13 Apr 2012
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Bacteria are recognized by white blood cells as being foreign. White blood cells try to attack them (ones that are phagocytic) Interleukin i gains access to neurons in the brain, by crossing at circumventricular organs to get through the blood brain barrier. Interleukin i reaches the hypothalamus to increase temperature, goes to the anterior hypothalamus, and changes the set point: very few can withstand 41 c. Surface area is important for thermoregulation babies have smaller body, bigger surface area, so they can regulate better, and can withstand higher temperatures than adults. Pass out due to heat: heat will activate ans, body will want to thermoregulate sweat, dilation of blood vessels: water from extracellular fluid (blood): decreased blood volume, hypovolemia. Heat stroke: the consequence of brain no longer being able to thermoregulate system is no longer functional (severe elevation of core temperature, impaired cns function, organ and tissue damage)
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