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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
30/06/2023 |
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Autoria: |
LINZELL, J. L.; PEAKER, M. |
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Título: |
The distribution and movements of carbon dioxide, carbonic acid and bicarbonate between blood and milk in the goat. |
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Ano de publicação: |
1975 |
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Fonte/Imprenta: |
Journal of Physiology, v. 244, n. 3, p. 771-782, Jan. 1975. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: 1. A-V differences and milk concentrations of respiratory gases, pH, HCO3 and H2CO3 have been measured in lactating goats and cows. 2. The pH and [HCO3 minus] of milk were significantly lower than those of plasma while milk PCO2 was virtually identical to that of mammary venous blood. [H2CO3+ dissolved CO2] was similar in milk and blood. 3. 14-C (from injected [14-C]HCO3 minus was found to cross the mammary epithelium in both directions. 14-C also passed across the duct epithelium and since this epithelium has previously been shown to be impermeable to ions it is argued that 14-C crossed in an unionized form, i.e. as CO2 and/or H2CO3. 4. Hourly milking with the aid of oxytocin raised milk pH, [HCO3 minus], [H2CO3], [Na] and E1Cl], and lowered [K], [lactose] and [phosphate]. These effects are discussed in relation to the hypothesis proposed previously for the action of oxytocin on milk composition. 5. A scheme for the distribution and movements of CO2, H2CO3 and HCO3 minus between extracellular fluid and milk is suggested, and discussed in relation to Cl minus transport. |
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Palavras-Chave: |
Carbon Radioisotopes. |
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Thesagro: |
Caprino; Fisiologia; Glândula Mamaria; Lactose; Reprodução. |
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Thesaurus Nal: |
Cattle; Chlorides; Epithelium; Goats; Mammary glands; Metabolism; Milk analysis; Oxytocin; Pharmacology; Physiology; Pregnancy; Reproduction; Sodium. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
null
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
