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Micropuncture study of composition of proximal and distal tubular fluid in rat kidney
Abstract
Fluid was collected by micropuncture from proximal and distal convolutions of anesthetized rats and analyzed for inulin, sodium, urea, and total osmotically active solute. The proximal fluid/plasma (F/P) sodium ratio was not significantly different from unity in antidiuretic animals, but was as low as 0.78 during mannitol diuresis. The distal F/P sodium ratio averaged 0.62 in antidiuresis, and 0.24 during osmotic diuresis. The data are interpreted to indicate active sodium transport by both proximal and distal convolutions. The F/P ratios for inulin, urea, and total osmotically active solute are in general agreement with previous studies.
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Cited by
Calcium Absorption Across Epithelia
Hoenderop, J. G. J., Nilius, B., & Bindels, R. J. M. (2005) · Physiological Reviews · doi:10.1152/physrev.00003.2004 · Cited by 936
Thurau, K., & Schnermann, J. (1965) · Klinische Wochenschrift · doi:10.1007/bf01483845 · Cited by 362
The Physiology of Urinary Concentration: An Update
Sands, J. M., & Layton, H. E. (2009) · Seminars in Nephrology · doi:10.1016/j.semnephrol.2009.03.008 · Cited by 223
Metadata
- Authors
- Ullrich, K. J., Schmidt-Nielsen, B., O'Dell, R., Pehling, G., Gottschalk, C. W., Lassiter, W. E., & Mylle, M.
- Venue
- American Journal of Physiology-Legacy Content
- Publisher
- American Physiological Society
- Published
- 1963-04-01
- Volume
- 204
- Issue
- 4
- Pages
- 527-531
- ISSN
- 0002-9513 (ISSN-L)
- OpenAlex
- W2417140924
- Cited by
- 168
- References
- 0
- FWCI
- 8.18
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Micropuncture study of composition of proximal and distal tubular fluid in rat kidney. https://app.cochat.ai/papers/10.1152/ajplegacy.1963.204.4.527
- The paper
- Ullrich, K. J., Schmidt-Nielsen, B., O'Dell, R., Pehling, G., Gottschalk, C. W., Lassiter, W. E., & Mylle, M. (1963). Micropuncture study of composition of proximal and distal tubular fluid in rat kidney. American Journal of Physiology-Legacy Content. https://doi.org/10.1152/ajplegacy.1963.204.4.527
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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