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Thermoregulation

            It is hard to believe that some plants produce as much heat for their weight as birds do, which are the greatest heat producers.
             of all. It is even harder to believe that some are able to thermoregulate, which means that they actually alter their heat.
             production to keep their temperature constant in fluctuating air temperatures. This is similar to what mammals do. The .
             article I am reviewing tells about few a plants that do this, and how they do it.
             There are only three plants which have yet been shown to regulate their temperature. They are the Philodendron selloun, the.
             Skunk Cabbage, and the Sacred Lotus. The most extensive testing has been done on the P. selloun. The earliest testing aimed.
             to do little more than determine whether the inflorescence actually had become hot. In the experiment spadices were impaled.
             with temperature probes into the plant and the probes were connected to a machine that recorded the temperature.
             continuously. During the measurement period the temperature outside averaged 20 degrees Celsius and the temperature in.
             the plant remained 20 degrees higher. This proved that the inflorescence was hotter than its environment.
             The next experiment aimed to show the range of the P. selloun's heat producing capabilities. Some specimens were cut and .
             put into indoor cabinets where the temperature could be varied. The reason the plants were placed in indoor cabinets was so.
             that the plants rate of heat production could be measured by the expedient of measuring its rate of consumption of oxygen. .
             Then the inflorescences were examined at air temperatures from low freezing to temperatures that are uncomfortably hot.
             for humans. At the coldest extremes some of the inflorescences could not heat up at all. But their temperatures went to as.
             high as 38 degrees Celsius when the environment temperature was still 4 degrees C. The cuttings became hotter as the air .
             temperature rose further. The inflorescences peaked at 46 degrees C when the inside of the cabinet was 39 degrees C.


Essays Related to Thermoregulation

1. Temperature Regulation in Animals

Animals can be classified according to their BEHAVIORAL or STRUCTURAL strategies for thermoregulation. ... In endotherms, high metabolic rates and heat production become important for thermoregulation. ... Another way of classifying animals is according to their Structural Strategies for thermoregulation. ... (2) Evaporative cooling is one method of thermoregulation in homeotherms. ... (5) Counter current system such as the flipper of the whale is another strategy for thermoregulation. ...

  • Word Count: 1286
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2. Children and Young Athletes

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3. Animals

Animals differ in their abilities to regulate body temperature (thermoregulation). ... Even more useful terms are Ectothermic or Endothermic, which suggest two different mechanisms of thermoregulation. ... In all Endotherms, including polar bears, thermoregulation is controlled by the tuber cinereum of the hypothalamus. ... This thermoregulation is behavioral rather than metabolic as in endotherms, however. ...

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