| pubmed-article:5653214 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:5653214 | lifeskim:mentions | umls-concept:C0034721 | lld:lifeskim |
| pubmed-article:5653214 | lifeskim:mentions | umls-concept:C0034693 | lld:lifeskim |
| pubmed-article:5653214 | lifeskim:mentions | umls-concept:C0439849 | lld:lifeskim |
| pubmed-article:5653214 | lifeskim:mentions | umls-concept:C0027713 | lld:lifeskim |
| pubmed-article:5653214 | lifeskim:mentions | umls-concept:C0022677 | lld:lifeskim |
| pubmed-article:5653214 | lifeskim:mentions | umls-concept:C0017654 | lld:lifeskim |
| pubmed-article:5653214 | lifeskim:mentions | umls-concept:C0037473 | lld:lifeskim |
| pubmed-article:5653214 | pubmed:issue | 6 | lld:pubmed |
| pubmed-article:5653214 | pubmed:dateCreated | 1968-7-29 | lld:pubmed |
| pubmed-article:5653214 | pubmed:abstractText | We have tested two of the hypotheses proposed to explain the adjustment in sodium reabsorption in the proximal tubule that follows a change in the rate of glomerular filtration (glomerulotubular balance). Using the recollection micropuncture technique, we were able to measure the immediate and late changes in reabsorptive rate after an acute alteration in filtration rate produced by aortic constriction and release of constriction. It was found that fractional reabsorption, as measured by the inulin tubule fluid to plasma (TF/P) ratio, increased after aortic constriction and decreased after release, but that in most instances, absolute reabsorptive rate changed in parallel to glomerular filtration rate. The change was similar whether the collections were made less than 1 or more than 5 min after the change in blood pressure. The rapid time course of this adjustment in reabsorptive rate is viewed as evidence against an intrarenal humoral feedback mechanism. In the same experiments we measured the (TF/P)(In), transit time, and flow rate of fluid in single nephrons before and during aortic constriction or release of aortic constriction. The change in reabsorptive rate and the simultaneous change in calculated cross-sectional area of the tubule lumen were rarely proportional, i.e., C/pir(2) was not constant. In other experiments, these same measurements were made before and during periods of increased ureteral pressure. Despite large increments in calculated cross-sectional area, the absolute rate of reabsorption either remained relatively unchanged or fell in proportion to the change in filtration rate. It is concluded that under these conditions, reabsorptive rate is governed by some factor other than tubule geometry. | lld:pubmed |
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| pubmed-article:5653214 | pubmed:language | eng | lld:pubmed |
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| pubmed-article:5653214 | pubmed:citationSubset | AIM | lld:pubmed |
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| pubmed-article:5653214 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:5653214 | pubmed:month | Jun | lld:pubmed |
| pubmed-article:5653214 | pubmed:issn | 0021-9738 | lld:pubmed |
| pubmed-article:5653214 | pubmed:author | pubmed-author:BrennerB MBM | lld:pubmed |
| pubmed-article:5653214 | pubmed:author | pubmed-author:BennettC MCM | lld:pubmed |
| pubmed-article:5653214 | pubmed:author | pubmed-author:BerlinerR WRW | lld:pubmed |
| pubmed-article:5653214 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:5653214 | pubmed:volume | 47 | lld:pubmed |
| pubmed-article:5653214 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:5653214 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:5653214 | pubmed:pagination | 1358-74 | lld:pubmed |
| pubmed-article:5653214 | pubmed:dateRevised | 2009-11-18 | lld:pubmed |
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| pubmed-article:5653214 | pubmed:year | 1968 | lld:pubmed |
| pubmed-article:5653214 | pubmed:articleTitle | The relationship between glomerular filtration rate and sodium reabsorption by the proximal tubule of the rat nephron. | lld:pubmed |
| pubmed-article:5653214 | pubmed:publicationType | Journal Article | lld:pubmed |
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