ISSN:
1432-0827
Keywords:
Calcium transport
;
Undernutrition
;
Growth
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
,
Physics
Notes:
Abstract Active transport of calcium across the duodenum was measuredin vitro in rats growing normally and in rats during undernutrition and subsequent rehabilitation. In rats growing normally duodenal calcium transport was an inverse function of age and the length and mineral concentration of the femur. Duodenal calcium transport was reduced during undernutrition and was stimulated when the undernutrition was relieved. Calcium transport was not related to age nor to the size and composition of the femur during undernutrition and rehabilitation. Under all the conditions of the study calcium transport across the duodenum was a direct function of rate of growth. This finding supports the view that calcium absorption is related to the needs of the organism at the time. Duodenal calcium transport, which was reduced in slowly growing rats, both undernourished and not undernourished, could be stimulated with small amounts of 1,25-DHCC but not with large amounts of cholecalciferol or 25-HCC. These findings may suggest that the growth rate of the body has a bearing on the production of and or metabolism of 1,25-DHCC.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02008237
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