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:6/26/2016)... ... 27, 2016 , ... Quality metrics are proliferating in cancer care, and are ... the eye of the beholder, according to experts who offered insights and commentary in ... Managed Care. For the full issue, click here . , For the American ...
(Date:6/26/2016)... ... ... a legally blind and certified personal trainer is helping to develop a weight loss fitness ... to fix the two major problems leading the fitness industry today:, , ... They don’t eliminate all the reasons people quit their exercise program ...
(Date:6/25/2016)... ... ... closing of Bruton Memorial Library on June 21 due to a possible lice infestation, as ... of head lice: the parasite’s ability to live away from a human host, and to ... one in the event that lice have simply gotten out of control. , As lice ...
(Date:6/25/2016)... , ... June 25, 2016 , ... ... and non-athletes recover from injury. Recently, he has implemented orthobiologic procedures as a ... area —Johnson is one of the first doctors to perform the treatment. Orthobiologics ...
(Date:6/24/2016)... ... June 24, 2016 , ... Those who have experienced traumatic events ... turn to unhealthy avenues, such as drug or alcohol abuse, as a coping mechanism. ... tools for healthy coping following a traumatic event. , Trauma sufferers tend to feel ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... and SAN CLEMENTE, Calif. , June 24, 2016 ... mobile pulmonary function testing company, is now able to perform sophisticated ... by ndd Medical Technologies , Inc. Patients ... hospital-based labs.  Thanks to ndd,s EasyOne PRO ® , ARL patients ... get any needed testing done in the comfort of her own ...
(Date:6/24/2016)... -- According to a new market research ... Safety Pen Needles), Needle Length (4mm, 5mm, 6mm, 8mm, ... Purchase (Retail, Non-Retail) - Trends & Global Forecasts to ... for the forecast period of 2016 to 2021. This ... 2021 from USD 1.65 Billion in 2016, growing at ...
(Date:6/24/2016)... Belgium , June 24, 2016 /PRNewswire/ ... announced the appointment of Dr. Edward Futcher ... a Non-Executive Director, effective June 23, 2016.Dr. Futcher ... and Nominations and Governance Committees.  As a non-executive ... provide independent expertise and strategic counsel to VolitionRx ...
Breaking Medicine Technology: