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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
06/07/2017 |
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Data da última atualização: |
06/07/2017 |
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Autoria: |
MILLIGAN, L. P.; McBRIDE, B. W. |
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Título: |
Energy costs of ion pumping by animal tissues. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
The Journal of Nutrition, v. 115, n. 10, p. 1374-1382, Oct. 1985. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Results from recent in vitro studies indicate that in excess of 20% of the energy expenditure of skeletal muscle, duodenal epithelium and liver of domestic ruminants is to achieve Na+ and K+ transport across the plasma membrane. The energy cost of active Ca2+ transport is less clear but is likely less than 10% of the total expenditure of skeletal muscle at rest. Energy expenditure on Na+ and K+ transport was quite sensitive to the physiological state of the animal. During lactation, Na+ and K+ transport accounted for nearly half of the in vitro O2 uptake of skeletal muscle, duodenal epithelium and liver. The energetic cost of supporting Na+ and K+ transport was also elevated in young, as compared with older animals, by feed intake and by exposure to cold. Na+ and K+ transport appears to be a substantial component of the maintenance energy expenditure of ruminant tissues. Its variation, therefore, implies that change of maintenance energy expenditures with physiological state of the animal warrants serious attention. |
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Palavras-Chave: |
Mucous membrane. |
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Thesagro: |
ATP. |
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Thesaurus Nal: |
Animal feeding; Animal nutrition; Calcium; Cattle; Duodenum; Energy Metabolism; Ewes; Intestines; Ion exchange; Overweight; Physiology; Potassium; Pregnancy; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01836naa a2200325 a 4500
001 2072043
005 2017-07-06
008 1985 bl uuuu u00u1 u #d
100 1 $aMILLIGAN, L. P.
245 $aEnergy costs of ion pumping by animal tissues.
260 $c1985
520 $aAbstract: Results from recent in vitro studies indicate that in excess of 20% of the energy expenditure of skeletal muscle, duodenal epithelium and liver of domestic ruminants is to achieve Na+ and K+ transport across the plasma membrane. The energy cost of active Ca2+ transport is less clear but is likely less than 10% of the total expenditure of skeletal muscle at rest. Energy expenditure on Na+ and K+ transport was quite sensitive to the physiological state of the animal. During lactation, Na+ and K+ transport accounted for nearly half of the in vitro O2 uptake of skeletal muscle, duodenal epithelium and liver. The energetic cost of supporting Na+ and K+ transport was also elevated in young, as compared with older animals, by feed intake and by exposure to cold. Na+ and K+ transport appears to be a substantial component of the maintenance energy expenditure of ruminant tissues. Its variation, therefore, implies that change of maintenance energy expenditures with physiological state of the animal warrants serious attention.
650 $aAnimal feeding
650 $aAnimal nutrition
650 $aCalcium
650 $aCattle
650 $aDuodenum
650 $aEnergy Metabolism
650 $aEwes
650 $aIntestines
650 $aIon exchange
650 $aOverweight
650 $aPhysiology
650 $aPotassium
650 $aPregnancy
650 $aSheep
650 $aATP
653 $aMucous membrane
700 1 $aMcBRIDE, B. W.
773 $tThe Journal of Nutrition$gv. 115, n. 10, p. 1374-1382, Oct. 1985.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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