Navigation Links
Rudolph the red-nosed reindeer's cooling strategy revealed
Date:10/26/2011

Insulated in a luxuriously thick winter coat, reindeer are perfectly prepared for the gripping cold of an Arctic winter. But the pelt doesn't just keep the cold out, it keeps the warmth in too: which is fine when the animals are resting, but what happens when they are active and generating heat? Usain Bolt would never sprint in a fur coat so how do exercising reindeer avoid overheating? Arnoldus Blix from the University of Troms, Norway, explains that the animals have three tactics: panting with their mouths closed to evaporate water from the nose; panting with the mouth open to evaporate water from the tongue; and activating a cooling system that selectively cools the blood supply to the brain. But how do they coordinate these different strategies for protection? Intrigued, Blix and his colleagues Lars Walle from the University of Oslo, Norway, and Lars Folkow, also from Troms, decided to monitor reindeer brain temperatures, breathing rates and the blood flow through several major blood vessels in the head, to find out how active reindeer keep cool in winter. The team publish their discovery that reindeer use three strategies to keep cool and only resort cooling their brains with a heat exchanger when their temperature becomes dangerously high in The Journal of Experimental Biology at http://jeb.biologists.org.

'Reindeer are the best animals to work with; once they trust the trainer they will do anything for you,' explains Blix. So, the team trained reindeer to trot at 9km/h on a treadmill in temperatures from 10 to 30C to get the animals warmed up while they recorded the animals' physiological responses. In the early stages of the run their breath rate rocketed from 7breaths/min to an impressive 260breaths/min. Blix explains that the animals were inhaling chilly air through their noses and evaporating water from the mucous membranes to cool blood in the nasal sinuses before sending it back to the rest of
'/>"/>

Contact: Sue Chamberlain
jeb@biologists.org
44-122-342-5525
The Company of Biologists
Source:Eurekalert

Page: 1 2

Related biology news :

1. Back off, Rudolph: Protecting this years Christmas tree crop
2. Albedo effect in forest disturbances can cause added warming, bonus cooling
3. Reforestations cooling influence -- a result of farmers past choices
4. Significant role of oceans in onset of ancient global cooling
5. Pitt study finds green water treatments may not kill bacteria in large building cooling systems
6. Signs of reversal of Arctic cooling in some areas
7. Hydrocooling shows promise for reducing strawberry weight loss, bruising
8. Cantabrian cornice has experienced seven cooling and warming phases over past 41,000 years
9. CO2 drop and global cooling caused Antarctic glacier to form
10. Decline of carbon-dioxide-gobbling plankton coincided with ancient global cooling
11. Powerful antibody-based strategy suggests a new therapeutic approach to diabetes and obesity
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/24/2014)... the largest river turtle in North America, weighing in ... century. Now researchers from Florida and the University of ... but three. , Examining museum specimens and wild ... ancient reptile. , Once heavily hunted for turtle meat ... Turtle Soup in the 1960s the riverine populations ...
(Date:4/24/2014)... A common plant puts out a welcome mat to bacteria ... mix. , The study published this week in the ... targets during the battle between microbe and host that researchers ... the humble and oft-studied plant Arabidopsis puts out ... It,s as if a hostile army were unknowingly passing by ...
(Date:4/23/2014)... pair of bioethics experts have added "playwright" to their ... in grappling with an onslaught of ethical issues as ... the human genome was first sequenced. , Until ... W. Bush have been performed for, and by, their ... conferences, meetings and in classrooms. With Oxford University ...
Breaking Biology News(10 mins):Two new US turtle species described 2Two new US turtle species described 3How a plant beckons the bacteria that will do it harm 2How a plant beckons the bacteria that will do it harm 3Bioethicists use theatrical narratives to bridge the gap between society and science 2Bioethicists use theatrical narratives to bridge the gap between society and science 3
... and partnering organizations have discovered a remarkably primitive eel in ... Palau. This fish exhibits many primitive anatomical features unknown in ... living eels, resulting in its classification as a new species ... is published online in the Proceedings of the Royal ...
... mice exposed to prenatal stress are more sensitive to stress ... issue of The Journal of Neuroscience . These findings ... in stress response that may be passed across generations. ... previously found that male mice were sensitive to stress their ...
... Switzerland have investigated the remarkable distance that microorganisms may ... their potential to colonise new lands and also potentially ... Moores University (LJMU), Swiss Federal Institute for Forest, Snow ... de Lausanne (EPFL) the University of Neuchtel published their ...
Cached Biology News:Scientists discover the most primitive living eel 2Effects of prenatal stress passed across generations in mice 2Life on the wind: Study reveals how microbes travel the Earth 2
(Date:1/15/2014)... 2014   Niagara Thermal Products is proud to ... Technologies LLC ("B3") as the critical thermal component supplier ... the Army Corps of Engineers.  B3 has developed the ... contaminants and destroys VOCs and other chemical pollutants, allergens ...
(Date:1/15/2014)... , Jan. 15, 2014 ­ RedBrick Health , ... change technology, today announces that EmblemHealth , the ... wellness company, is now providing the RedBrick Compass health ... program, to all of its members. EmblemHealth is among ...
(Date:1/15/2014)... January 15, 2014 Two champions of ... their sponsorship of an annual competition for middle and ... access to, innovative STEM study. The competition presents students ... Tests of Engineering Aptitude, Mathematics, and Sciences is ...
(Date:1/15/2014)... Freeslate, Inc ., the leading provider ... Limited, one of India’s top five pharmaceutical companies, has ... for high throughput solid form screening. , ... wide range of quality, affordable generic and branded formulations ...
Breaking Biology Technology:Niagara Thermal Products LLC Selected as Critical Supplier for Buffalo BioBlower Air Purification Systems 2EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 2EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3
... sports nutrition retailer launches Max Crunch bar ... probiotics help with protein digestion and assimilationANAHEIM, ... Muscle Sports Nutrition today announced the launch ... bar introduced in the U.S. The collaboration ...
... SHANGHAI, China, Feb. 10 /PRNewswire-Asia-FirstCall/ -- China-Biotics, Inc.,(Nasdaq: ... leading Chinese firm,specializing in the manufacture, research, development, ... of the Company,s,management will present at the upcoming ... held February 16-18, 2009, in Dana Point, California. ...
... 10 Compendia Bioscience, Inc. today announced the results ... renewal rate from its customers. New customers and increased ... of the Top 10 pharmaceutical companies, led to a ... year. Compendia,s core product, Oncomine(TM), has become a standard ...
Cached Biology Technology:Max Muscle Introduces First-Ever Probiotics Protein Bar 2Max Muscle Introduces First-Ever Probiotics Protein Bar 3China-Biotics, Inc. to Present at Roth Capital Partners 21st Annual OC Growth Stock Conference 2On Third Anniversary, Compendia Bioscience Announces Continued Revenue Growth, Major Long-Term Customer Contracts and Forecasts Profitability 2
Immunogen: C terminus [VQLKRSKNDSKPYC] of cardiac elav-type RNA-binding protein (ETR-3) Storage: -20 C, Avoid Freeze/Thaw Cycles...
Borosilicate Glass. Certified for use with the Beacon 2000 Systems, 1,000 tubes/case...
... The Beacon 2000 One-Step FP Standardization ... high and low fluorescence polarization values ... of the Beacon 2000 System. It ... polarization values generated by their instrument ...
Whole blood is collected from mice (Swiss Webster, 8-10 weeks old,either sex) and processed within 45 minutes of collection. The complement is then filtered and pooled on ice, bottled and stored at -...
Biology Products: