In the nephron loop,
A) active secretion of acids, ammonia, and drugs occurs.
B) ion pumps, which respond to aldosterone, exist.
C) reabsorption of ions, amino acids, water, and other organic nutrients is its primary function.
D) two-thirds of the sodium and chloride ions remaining in the tubular fluid are reabsorbed.
E) final adjustments are made in the composition and concentration of the tubular fluid.

Question

Quizplus · Accepted Answer

In the nephron loop, two-thirds of the sodium and chloride ions remaining in the tubular fluid are reabsorbed. The loop of Henle in the nephron is responsible for establishing an osmotic gradient in the renal medulla. The thick ascending limb of the loop is impermeable to water, but actively transports sodium and chloride ions out of the tubular fluid, creating a hypertonic environment in the medulla. This sets up a concentration gradient that allows for the reabsorption of water in the collecting ducts.

In the Nephron Loop