NaimExplain

In the tubules, how are waste products such as urea and creatinine reabsorbed? Answer: Poorly from the tubules and excreted in relatively large amounts.

What steps are involved in the net reabsorption of sodium ions from the tubular lumen back into the blood? 1. Sodium diffuses across the luminal membrane into the cell down an electrochemical gradient established by the sodium-potassium ATPase pump on the basolateral side of the membrane. 2. Sodium is transported across the basolateral membrane against an electrochemical gradient by the sodium-potassium ATPase pump. 3. Sodium, water, and other substances are reabsorbed from interstitial fluid into the peritubular capillaries by ultrafiltration.

What are the primary active transporters in the kidneys? Answer: Sodium-Potassium ATPase,  Hydrogen ATPase,  Hydrogen-potassium ATPase, and  Calcium ATPase

For a substance to be reabsorbed, how must it be transported? 1) across the tubular epithelial membranes into the renal interstitial fluid and then. 2) through the peritubular capillary membrane back into the blood.