Skip to main content

Renal Tubular Reabsorption

Meaning

Renal tubular reabsorption is the critical physiological process occurring in the kidney tubules where filtered substances, including water, electrolytes, glucose, and amino acids, are selectively transported from the tubular fluid back into the peritubular capillaries and ultimately the bloodstream. This process is essential for maintaining fluid balance, electrolyte homeostasis, and retaining vital nutrients that were initially filtered out of the blood by the glomerulus. The efficiency of reabsorption is tightly regulated by hormones like aldosterone and parathyroid hormone, directly impacting systemic blood volume and mineral levels. Clinical evaluation of this function is vital for diagnosing metabolic and endocrine disorders.