In the thick segment of the ascending limb of the nephron loop,K⁺ reenters the cell from the interstitial fluid via the _________.K⁺ is then secreted into the tubular fluid. A) Na⁺-K⁺ pump B) countercurrent multiplier C) countercurrent exchange D) vasa recta E) juxtaglomerular apparatus

Question

Quizplus · Accepted Answer

The Na⁺-K⁺ pump, also known as the sodium-potassium pump, is responsible for bringing back K⁺ from the interstitial fluid into the cell in the thick segment of the ascending limb of the nephron loop. Once inside the cell, K⁺ is then secreted into the tubular fluid. The other options (B, C, D, and E) are not directly involved in this process.

In the Thick Segment of the Ascending Limb of the Nephron