Thermoregulation physiology Podcast
August 10, 2012
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7:12Now PlayingThermoregulation physiology Podcast
YouTube Description
as posted by the channelTemperature Podcast
Life can only exist within narrow temperature ranges. Some animals, e.g. fish and
reptiles, vary their body temperature depending on environmental conditions. These
animals are described as 'cold blooded' or poikilothermic. However, in higher animals
and humans, body temperature must be finely controlled within a fairly narrow
temperature range. As previously discussed, cellular biochemistry is essential for
life. All intracellular biochemistry is catalysed by enzymes which only work within
narrow ranges of temperature. If the body becomes too hot or too cold enzymic
activity will be reduced and physiological functions will no longer work efficiently.
Eventually both hyper or hypothermia will lead to death. Humans are biologically
classified as homoiothermes because we maintain a constant body temperature.
This means that if body temperature starts to rise cooling mechanisms must be
employed. Likewise, when body temperature falls there must be mechanisms available
to conserve heat and increase body temperature.
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