Use of physiological connectivity in solving renal concentrating mechanism equations
نویسندگان
چکیده
منابع مشابه
Assessment of renal concentrating ability.
Maximum urine osmolality was measured during a 24-hour control period in normal ambulant and working subjects and hospital inpatients and compared with that achieved after intramuscular injection of 4 microgram desamino-cys-1-8-D-arginine vasopressin (DDAVP). Most of the normal subjects passed maximally concentrated urine at some time during the control period. The results suggest that in less ...
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A number of advances which took place during the last decade have increased our understanding of the physiology and pathophysiology of urinary concentrating defects. The development of a highly sensitive radioimmunoassay for plasma vasopressin concentration has shed new light on vasopressin control mechanisms. The cellular action of vasopressin in biological membranes has been studied by variou...
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The ability of the kidneys to excrete a concentrated urine is impaired together with other renal functions whenever the kidneys are progressively scarred and the amount of functioning renal parenchyma is diminished. Concentrating capacity and glomerular filtration rate are therefore reduced roughly in parallel in many common diseases which cause widespread scarring of the kidneys. The present d...
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In this chapter, we mainly focus on the acclimation of cyanobacteria to the changing ambient CO2 and discuss mechanisms of inorganic carbon (Ci) uptake, photorespiration, and the regulation among the metabolic fluxes involved in photoautotrophic, photomixotrophic and heterotrophic growth. The structural components for several of the transport and uptake mechanisms are described and the progress...
متن کاملOn the mechanism of impairment of renal concentrating ability in hypercalcemia.
A decrease in the ability of the kidneys to concentrate the urine is characteristic of many varieties of experimental and clinical hypercalcemia, hypercalciuria and nephrocalcinosis (1). Vitamin D intoxication in rats (2) and large doses of parathyroid extract in dogs (3, 4), in addition to producing hyposthenuria, have been shown to cause morphological changes which are most marked in the epit...
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ژورنال
عنوان ژورنال: Mathematical and Computer Modelling
سال: 1990
ISSN: 0895-7177
DOI: 10.1016/0895-7177(90)90238-i