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 ?
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 proposed mechanism of exercise-induced proteinuria involves increased glomerular permeability and exceeding the maximum tubular reabsorption capacity [24,25].
However, we could not determine whether normal physiological variability in renal tubular reabsorption is the only explanation.
However, the homeostasis of carnitine is kept through very efficient mechanisms such as the ability ofthe human body to synthesize sufficient amounts of carnitine even under adverse dietetic management and a very efficient tubular reabsorption of carnitine under normal conditions.
Renal elimination of drugs depends on three processes: glomerular filtration, tubular secretion and tubular reabsorption.
tubular handling, the fractional proximal tubular reabsorption (91.
Control of magnesium occurs primarily by filtration and tubular reabsorption, although the mechanisms involved are not yet well defined.
7,8] Consequently, this pattern is frequently visible in UIFE studies of patients with tubular proteinuria of any cause, as a reflection of impaired tubular reabsorption.
The excretion of protein in the urine is determined by several factors, including the plasma protein concentration, renal blood flow, glomerular filtration, tubular reabsorption, secretion, and postrenal processes.