Navigation Links
Study Shows How Busy Reindeer Keep Their Cool
Date:12/24/2011

SATURDAY, Dec. 24 (HealthDay News) -- Reindeer have lots to do this time of year -- from playing their reindeer games to dragging heavy sleighs -- but despite all their frenzied activity they manage to keep cool under luxurious winter coats without getting dangerously overheated, researchers have found.

Now, Norwegian scientists have gained insight into how they do it by monitoring the brains of reindeer as they exercised on solid ground.

In the study, the reindeer trotted at speeds of 6 miles per hour on a treadmill in temperatures from 50 to 86 degrees Fahrenheit.

"Reindeer are the best animals to work with; once they trust the trainer they will do anything for you," study author Arnoldus Blix, a biologist at the University of Tromso, said in a news release from The Company of Biologists.

Blix and colleagues found that reindeer pant with their mouths either closed or open, allowing them to evaporate water from either the nose or the tongue. Evaporating water helps the reindeer to cool blood in their nasal sinuses; the cooled blood then goes back to the rest of their bodies.

The researchers also discovered that the reindeer turn to another strategy when their temperatures get too high: they cool their brains through a heat-exchange system. They do this by diverting the blood that had been cooled by going through the nose to the brain and away from the body. This protects the brain from overheating.

The findings were published in a recent issue of the Journal of Experimental Biology.

Reindeer are unique in other ways. For one, they've lost almost all signs of the circadian clocks that humans and other animals have because the day/night cycle at Arctic latitudes is so irregular.

Reindeer are also extremely energy-efficient animals, a fact that allows them to travel great distances -- more than 3,100 miles a year, at least in American herds.

And, of course, they're able to fly around the world every Christmas Eve, although they appear to get a big boost from the powers of imagination.

More information

Learn more about reindeer from the Smithsonian National Museum of Natural History.

-- Randy Dotinga

SOURCE: The Company of Biologists, news release, Oct. 27, 2011


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Many VA Patients Would Share Personal Health Records, Study Finds
2. Hay Fever Symptoms Worse in Spring Than Summer: Study
3. Wayne State receives DOD grant; study may give insight to slow or halt breast cancer
4. Most Weight Regained by Older Women Is Fat, Study Finds
5. Fears of Divorce May Be Keeping Many Young Couples From Marriage: Study
6. Journal Retracts Faulty Chronic Fatigue Study
7. Caring for Low Birth-Weight Baby Hard on Moms: Study
8. HIV study named 2011 breakthrough of the year by Science
9. Thinner Brains Could Signal Alzheimers, Study Suggests
10. Heart disease study highlights Scottish ethnic groups most at risk
11. Study highlights impact of sleep deprivation on patients and health care providers
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Study Shows How  Busy Reindeer Keep Their Cool
(Date:1/18/2017)... ... 2017 , ... Floundering on New Year’s resolutions? Need an excuse to get ... reset. The U.S. Apple Association agrees and recommends starting each day with apples, ... to heart disease. , The U.S. Apple Association – which represents apple growers and ...
(Date:1/17/2017)... ... January 17, 2017 , ... In the crowded Ath-leisure market, ... stand-out company for several differences from other mainstream brands. , Firstly, in ... is called 'Agile' manufacturing - http://www.leanproduction.com/agile-manufacturing.html . It allows them to have ...
(Date:1/17/2017)... (PRWEB) , ... January 17, 2017 , ... SunView Software’s ... Award for Innovation of the Year. , Each year, Pink Elephant recognizes ... an innovative approach to address a specific business problem or opportunity. The award highlights ...
(Date:1/17/2017)... Clemente, CA (PRWEB) , ... January 17, 2017 ... ... Diego County, as well as Palm Desert, is opening a new office in ... Brainsway deep transcranial magnetic stimulation (dTMS) in Southern California, successfully treating individuals struggling ...
(Date:1/17/2017)... New York (PRWEB) , ... January 17, 2017 ... ... network – SightMD – will lecture to primary eye care practitioners on the ... conditions at the upcoming 13th Semi-Annual Continuing Education Symposium, according to eye surgeon, ...
Breaking Medicine News(10 mins):
(Date:1/18/2017)...   Seno Medical Instruments, Inc. , the leader ... the development of an opto-acoustic (OA/US) imaging device, today ... SVP of Engineering. Mr. Miller previously served as the ... headquarters in Bothell, Washington . Mr. ... to the development of innovative medical imaging products that ...
(Date:1/18/2017)... 2017  Tarix Orphan LLC today announced that the ... Pediatric Disease (RPD) designation for the company,s drug candidate ... (RDEB), a rare genetic skin disorder. There are currently ... to supportive care. "The RPD designation for ... granted by the FDA in this indication," said ...
(Date:1/18/2017)... YORK , January 18, 2017 ... of people regarding the use of cannabis both for medical ... only are more Americans open to the use of cannabis, ... financial sectors. According to Arcview Market Research, the North American ... up 30% from the previous year. The research projects sales ...
Breaking Medicine Technology: