Document Detail


Hypertonic fluids are secreted by medial and lateral segments in duck (Anas platyrhynchos) nasal salt glands.
MedLine Citation:
PMID:  11986388     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Indwelling catheters were used to collect fluid directly from the medial and lateral segments of duck nasal salt glands showing, for the first time, that the secretions are fully hypertonic before reaching the medial and lateral drainage ducts. Using this method it was possible to show that (a) there is a functional symmetry between the left and right salt glands, (b) the medial segment always secretes fluid at approximately twice the rate of the lateral segment and (c) fluid secreted by the medial segment has the same ionic composition but variable ion concentrations when compared with fluid from the lateral segment. A 12 % increase in post-segmental fluid osmolality was probably due to the evaporation of water from epithelial surfaces in the nasal cavities during breathing. A post-segmental outflux of Ca(2+), Mg(2+) and Cl(-) in the medial and lateral collecting ducts and/or nasal epithelium may be of adaptive significance when birds inhabit calcium- and magnesium-rich marine environments.
Authors:
David G Butler
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of physiology     Volume:  540     ISSN:  0022-3751     ISO Abbreviation:  J. Physiol. (Lond.)     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-05-02     Completed Date:  2002-09-16     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  0266262     Medline TA:  J Physiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1039-46     Citation Subset:  IM    
Affiliation:
Departments of Zoology and Physiology, University of Toronto, Toronto, Ontario, Canada M5S 3G5. dbutler@zoo.utoronto.ca
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MeSH Terms
Descriptor/Qualifier:
Animals
Calcium / metabolism
Catheters, Indwelling
Chlorides / metabolism
Ducks / physiology*
Functional Laterality
Hypertonic Solutions / metabolism
Magnesium / metabolism
Nasal Lavage Fluid
Nose
Regression Analysis
Reproducibility of Results
Salt Gland / secretion*
Specimen Handling / methods
Chemical
Reg. No./Substance:
0/Chlorides; 0/Hypertonic Solutions; 7439-95-4/Magnesium; 7440-70-2/Calcium
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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