The Na⁺-K⁺ ATPase transport system that plays a pivotal role in tubular reabsorption is located in the
A)luminal membrane of tubular cells
B)basolateral membrane of tubular cells
C)podocytes
D)glomerular capillary membrane
E)basement membrane

Question

Quizplus · Accepted Answer

The Na⁺-K⁺ ATPase transport system is responsible for the reabsorption of sodium (Na⁺) and the secretion of potassium (K⁺) in the renal tubules. This transport system is located in the basolateral membrane of tubular cells, which is the side of the cell that faces the interstitial fluid and the capillaries. This location allows the transport system to move Na⁺ out of the tubular lumen and into the interstitium, where it can be taken up by the capillaries and returned to the circulation.

The Na⁺-K⁺ ATPase Transport System That Plays a Pivotal Role