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:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... ... for human induced pluripotent stem (iPS) cells and other difficult to transfect cells, ... Cloning Medium. The PluriQ™ G9™ Gene Editing System is a complete ...
(Date:6/24/2016)... ... June 24, 2016 , ... To ... infrastructure. Most providers, however, are unsure how to move forward, given the need ... define a path forward tailored to an organization’s specific needs. , PYA Principal ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... SpiritQuest Sedona ... heart of West Sedona, surrounded by famous vortex sites: Cathedral Rock, Airport Mesa, and ... partner properties – the Lodge at Sedona as well as the Sedona Rouge, both ...
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... An ... may expose a possible link between head and neck cancer in individuals with unhealthy ... the study were evaluated based on whether they had gum disease, brushed their teeth ...
(Date:6/23/2016)... ... 23, 2016 , ... SyncDog, Inc. , the leading ... is featured in the current issue of Silicon Review magazine. Silicon ... technology solutions and features them in their magazine. The magazine allows top-level executives ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... Roche (SIX: RO, ROG; OTCQX: RHHBY) announced that it ... (procalcitonin) assay as a dedicated testing solution for people ... Roche is the first IVD company in the U.S ... assessment and management. PCT is a sepsis-specific ... blood can aid clinicians in assessing the risk of ...
(Date:6/23/2016)... , June 23, 2016 Research ... Pharma News Issue 52" report to their offering. ... in influenza treatment creates a favourable commercial environment for MedImmune ... growing patient base that will serve to drive considerable growth ... vaccine would serve to cap sales considerably, but development is ...
(Date:6/23/2016)... PARK RIDGE, Ill. and INDIANAPOLIS ... caliber of students receiving a Lilly Diabetes Tomorrow,s Leaders ... hands. The 2016 scholarship winners, announced today online at ... refused to let type 1 diabetes stand in the ... Lilly Diabetes has supported the Foundation,s scholarship program since ...
Breaking Medicine Technology: