Navigation Links
Why do insects stop 'breathing'? To avoid damage from too much oxygen, say researchers

A new study investigating the respiratory system of insects may have solved a mystery that has intrigued physiologists for decades: why insects routinely stop breathing for minutes at a time.

Challenging previous theories, researchers at UC Irvine and Humboldt University propose that insects such as grasshoppers, moths, butterflies, some types of fruit flies, beetles and bugs close off their respiratory systems periodically to keep out excess oxygen, thus preventing damage to their tissues.

Timothy Bradley, professor of ecology and evolutionary biology at UCI, and Stefan Hetz, assistant professor of physiology at Humboldt University, Germany, report their findings in the Feb. 3 issue of Nature.

The insect respiratory system is designed to accommodate occasions when the insect is active. For example, a grasshopper is most active when it flies. When the grasshopper is inactive and resting, however, it continues to breathe in oxygen at the same high volume it uses while flying. The result is excess internal oxygen that can cause oxidative damage -- the destruction of biomaterial due to excess oxygen -- to tissues. To protect their bodies, insects like grasshoppers discontinue breathing.

"We propose that most insects stop breathing in order to lower their internal oxygen concentration to physiologically safe levels, and that they then substantially reduce gas exchange to maintain the oxygen at these safe values," Bradley said. "This hypothesis explains the respiratory pattern of insects in different environments in ways that previous models can't."

Two previous models for explaining why insects punctuate their breathing with periods of closure are (1) such discontinuous breathing reduces water loss and (2) it enables insects to rid their bodies of carbon dioxide, respiration's byproduct, when the insects are underground. As is true for miners, insects, while underground, are faced with high-carbon-dioxide and low-oxygen amounts, ne
'"/>

Source:University of California - Irvine


Page: 1 2 3

Related biology news :

1. Researchers find how protein allows insects to detect and respond to pheromones
2. Experiments provide proof of how traveling in groups protects insects
3. Experiments provide proof of how traveling in groups protects insects
4. DDT-resistant insects have additional genetic advantage that helps resistance spread
5. K-State researchers study insects immune system
6. K-State researchers study gene regulation in insects
7. Gene needed for butterfly transformation also key for insects like grasshoppers
8. Value of services performed by insects tops $57 billion in US
9. Giant insects might reign if only there was more oxygen in the air
10. Why do insects like to eat some plants more than others?
11. Falling ants glide back to trunk to avoid dangers of forest floor
Post Your Comments:
(Date:9/16/2014)... functions in an organism. For example, they catalyze ... control immune system responses. Researchers established some years ... each other, but instead form complex networks. , ... many similarities with online social networks," says Dr. ... Biology. "Some proteins are good networkers that maintain ...
(Date:9/16/2014)... of wild foods, autumn harks a season of bounty. ... luring intrepid collectors to woodlands in search of elusive ... in the allure of the treasure hunt, and their ... existence. But are the mushrooms which you are eating ... diverse yet vastly underdocumented although some estimates range ...
(Date:9/15/2014)... evolved a simple, mechanical solution to avoid chromosome ... Science Express. , This ... that lead to infertility, miscarriage, or congenital conditions. ... these problems, but what exactly goes wrong is ... Wellcome Trust Center for Cell Biology at the ...
Breaking Biology News(10 mins):Good networkers make prime targets 2What's for dinner? Rapidly identifying undescribed species in a commercial fungi packet 2What's for dinner? Rapidly identifying undescribed species in a commercial fungi packet 3Cells simply avoid chromosome confusion 2Cells simply avoid chromosome confusion 3
... 2008 A Webinar hosted by TorreyPines Therapeutics, Inc. ... will bring together industry experts to discuss the ... through the inhibition of the neurotransmitter glutamate. The ... will moderate a discussion following brief presentations by: ...
... span the globe and beyond, covering southern Africa,s diamond ... in the Wyoming badlands, glacial erosion in East Greenland, ... rhinoceroses in Ukraine, gold nanoparticles in Australia, and the ... GSA TODAY contains the first authoritative geological and ...
... future of high-intensity x-ray science has never been brighter ... National Laboratory have devised a new type of next ... (X-FELO) we are proposing can create x-rays up to ... Argonne Distinguished fellow Kwang-Je Kim said. Current technology ...
Cached Biology News:Treating chronic pain, migraine & muscle spasticity through inhibition of neurotransmitter glutamate 2Treating chronic pain, migraine & muscle spasticity through inhibition of neurotransmitter glutamate 3July 2008 GEOLOGY and GSA Today media highlights 2July 2008 GEOLOGY and GSA Today media highlights 3July 2008 GEOLOGY and GSA Today media highlights 4July 2008 GEOLOGY and GSA Today media highlights 5July 2008 GEOLOGY and GSA Today media highlights 6July 2008 GEOLOGY and GSA Today media highlights 7July 2008 GEOLOGY and GSA Today media highlights 8A novel X-ray source could be brightest in the world 2
(Date:9/15/2014)... 15, 2014 Bioptigen announced ... OCT system for the optical device metrology and pre-clinical ... S4410 SDOCT for Contact Lens Metrology is designed ... high complexity contact lens, IOL structures, and donor tissues. ... complete contact lens immersed in a hydration bath (saline), ...
(Date:9/15/2014)... September 15, 2014 Applied Silicone ... silicones for the medical device and critical healthcare ... for the implantable medical device market. The ... technology delivering a silicone gel with improved fracture ... Matrix technology consists of two crosslinked networks working ...
(Date:9/15/2014)... Hydro Dynamics, Inc. (HDI) of ... it will be partnering with Proteaf Technologies (Proteaf) ... for implementing its Shock Wave Power Reactor (SPR) ... Continuous flow chemistry through process intensification has been ... markets for decades. The continuous chemistry has ...
(Date:9/12/2014)... using an electric field (magnetoelectric memory [MEM] effect), ... technology for information processing and storage. Multiferroic materials ... to the coexistence of electric and magnetic orders. ... electric and magnetic polarizations is rare in known ... MEM effect. This article briefly reviews a new ...
Breaking Biology Technology:Bioptigen Introduces Deep Imaging OCT System for Contact Lens Metrology 2Applied Silicone Launches Silicone Gel System with Dual Matrix Technology 2Hydro Dynamics Partners with the Continuous Flow Chemistry Experts of Proteaf Technologies 2
... , , , M. Arun Kumar, PhD, and Vincent ... Brinkmann BioSystems Laboratory, , Abstract , ... plates, , we carried out PCR reactions with ... commercial microplate supplier and compared the reaction , ...
... Perfectprep , Gel Cleanup Kit , ... George Halley, Eppendorf 5 Prime, Inc., , , ... Agarose gel electrophoresis is used extensively to separate and analyze , ... Perfectprep Gel Cleanup kit is used to purify DNA fragments of ...
... , , , , , ... The new Ependorf Micromanipulator for electro-physiology, , ... (MPI) for Biophysical Chemistry in Gttingen (Germany)., , , ... , The Micromanipulator PatchMan was used at MPI for a ...
Cached Biology Technology:An Assessment of the Eppendorf twin.tec plate performance in PCR* , applications 2An Assessment of the Eppendorf twin.tec plate performance in PCR* , applications 3An Assessment of the Eppendorf twin.tec plate performance in PCR* , applications 4An Assessment of the Eppendorf twin.tec plate performance in PCR* , applications 5An Assessment of the Eppendorf twin.tec plate performance in PCR* , applications 6An Assessment of the Eppendorf twin.tec plate performance in PCR* , applications 7Restriction Digests of DNA Isolated with the Perfectprep , Gel Cleanup Kit 2Restriction Digests of DNA Isolated with the Perfectprep , Gel Cleanup Kit 3Restriction Digests of DNA Isolated with the Perfectprep , Gel Cleanup Kit 4Restriction Digests of DNA Isolated with the Perfectprep , Gel Cleanup Kit 5PatchMan - Test Report 2
Preparation Note: Prepared essentially by method of Singer, T.P., J. Biol. Chem., 174, 11 (1948). Quality Clarifier: Contains lipase Unit Definition: One unit will hydrolyze 1.0 μmole of p-ni...
... Phosphatase-2A (PPase-2A) is a serine/threonine phosphatase isolated ... isolated as the heterodimer of 60kDa (A) ... ability to dephosphorylate the a-subunit of phosphorylase ... has broad substrate specificity and may play ...
... Assays in Tris buffer, pH 10.2 give ... buffer system. Assays in diethanolamine buffer, pH ... the glycine buffer system. Protein determined by ... buffer salts Preparation Unit Definition: One unit ...
... ATP Monitoring Kit measures adenosine ... sensitivity and a dynamic range. ... the assay measures ATP in ... over a concentration range of ...
Biology Products: