Reabsorption

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Reabsorption

 

reverse absorption of water and substances dissolved in it from primary urine flowing through the renal tubules; the final urine thus produced is excreted from the body. Among the essential substances that are reabsorbed are many amino acids, vitamins, and most Na+, K+, and Ca2+ions. The reabsorption of some substances varies with their concentration in the blood. For example, glucose is completely reabsorbed if its concentration in plasma is no more than 150–180 mg percent. At high concentrations, some of the glucose enters the urine (glucosuria).

References in periodicals archive ?
In this study, renal impairment and PRTD began to improve as early as three months after discontinuation of nucleotide analogue as seen from the rising TmP[O.sub.4]/GFR representing improved tubular reabsorption of phosphate and the declining 24h-our urinary protein and urinary [beta]2-microglobulin, which is a 12 kDA tubular protein with a component of major histocompatibility complex class I molecule [32].
Univariate analysis of aminoglycoside tubular reabsorption adjusted for age revealed an age dependent association of leucine (p < 0.01) and isoleucine (p < 0.01) tubular reabsorption and repeated tobramycin courses.
The level of tubular reabsorption of phosphorus was compared with the serum calcium, phosphorus and alkaline phosphatase levels measured at the 40th gestational week and alkaline phosphatase was found to be significantly increased in the group with a high tubular reabsorption of phosphorus ([greater than or equal to]%95).
The proximal tubular reabsorption (PTR) Z-score was then calculated as (Z-score of [alpha]1M + Z-score of [beta]2M)/2, the proximal tubular injury (PTI) Z-score as (Z-score of KIM-1 + Z-score of NAG + Z-score of NGAL)/3, and the combined proximal tubule (PT) Z-score as (PTR Z-score + PTI Z-score)/2.
It has been reported that when proteinuria is a consequence of tubular dysfunction, the amount of protein filtered by the glomeruli remains stable and the proteins with low molecular mass appear in larger quantity due to their incomplete tubular reabsorption [23,28].
However, we could not determine whether normal physiological variability in renal tubular reabsorption is the only explanation.
The kidneys' handling of drugs occurs through three processes: glomerular filtration, tubular reabsorption and tubular secretion.
This results in the escape of [beta]2-microglobulin and immunoglobulin light chains from proximal tubular reabsorption. It is often missed on dipstick testing, which detects only albumin.
This transport system is also involved in the renal tubular reabsorption and intestinal absorption of carnitine (20).
(6.) Persson P, Hansell P, Palm E Tubular reabsorption and diabetes-induced glomerular hyperfiltration, Acta Physiol (Oxf).
It belongs to a new class of diabetes compounds that block tubular reabsorption of glucose in the kidney.
Urine formation is achieved through the processes of glomerular filtration, tubular reabsorption, and secretion within the kidneys.