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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

... extreme temperatures, they must find a way to stabilize their metabolism independent of extreme temperatures. Animals can be classified according to their BEHAVIORAL or STRUCTURAL strategies for thermoregulation. Behavioral Strategies can be classified as either endothermic or exothermic. Endothermic animals or endotherms are animals that derive most of their body heat from their own internal ... biochemical processes and nervous system functions can go on at high, steady levels of activity. In endotherms, high metabolic rates and heat production become important for thermoregulation. ...

  • Word Count: 1286
  • Approx Pages: 5
  • Grade Level: Undergraduate

2. Children and Young Athletes

... form. These treatments can help children and young athletes play sport again after an overuse injury. Temperature control is managed by balancing heat loss with heat gain is managed Thermoregulation. Children are at an increased from environmental stress when compared to adults, they have shorter tolerance time in extreme heat increasing the chance of dehydration and when exposed to ... in colder temperatures to reduce the chance of hypothermia they need appropriate clothing and exercise to keep warm. Overall these managements will assist young athletes when playing sport to maintain ther...

  • Word Count: 1026
  • Approx Pages: 4
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3. The Cardiovascular System

... system are to 1.Transport nutrients, gases and waste products around the body, 2.To protect the body from infection and blood loss, 3. To help the body maintain a constant body temperature ( 'thermoregulation') and lastly 4. To help maintain fluid balance within the body Directive Q= HR x SV. Cardiac output increases because heart rate and stroke volume increase. Stroke volume stops increasing sooner then heart ... ...

  • Word Count: 1508
  • Approx Pages: 6
  • Has Bibliography
  • Grade Level: High School

4. MDMA - Neurotoxic and Empathogenic Drug

... increased arousal and energetic state "on top of increased heart rate and blood pressure" will usually be followed by muscular tension, such as jaw clenching/tooth grinding. Moreover, thermoregulation modifications increases body temperature and often lead to dry-mouth. Acute systemic toxicity of MDMA in humans from effects on the nervous system include: hyperthermia, convulsions/seizures, rhabdomyolysis, vomiting, disseminated ... ...

  • Word Count: 1019
  • Approx Pages: 4
  • Grade Level: Undergraduate

5. REM Sleep

... this area produced drowsiness and the subjects of the study readily fell asleep. Evidence also suggests that the mechanisms involved in an animal's ability to regulate its own body temperature (thermoregulation) are closely related to those involved in sleep. There are certain neurons that are extremely sensitive to changes in brain temperature. Warming of the preoptic area and the anterior hypothalamus ... ...

  • Word Count: 475
  • Approx Pages: 2
  • Grade Level: Undergraduate

6. Basketball and nutrition

... are very important to have as well. Please see the attached chart for the amount of recommended amount to consume for a basketball player. Fluid balance is essential to cardiovascular function, thermoregulation, injury prevention, optimal performance, and recovery from exercise. Fluid loss can be significant during exercise (up to 3 L/hr). Water loss increases heart rate by 8 beats per minute and impairs performance ... ...

  • Word Count: 1574
  • Approx Pages: 6
  • Grade Level: High School

7. Effects of sports drinks

... delay fatigue. Other electrolytes which are lost through sweating are also commonly added. However, too many electrolytes may lead to increased serum electrolyte and osmolality levels, which may negatively influence thermoregulation, depress sweating, and cause gastrointestinal distress. On the other hand, drinking large amounts of plain water to compensate sweat loss may induce hyponatremia (Brouns, Saris & Schneider, 1992). A recent reported that ... ...

  • Word Count: 1078
  • Approx Pages: 4
  • Grade Level: Undergraduate

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