When the Level of ADH (Antidiuretic Hormone) Decreases

Question

When the level of ADH (antidiuretic hormone) decreases,
A) a concentrated urine is produced.
B) less urine is produced.
C) the osmolarity of the urine decreases.
D) permeability to water in the collecting system increases.
E) water reabsorption increases in the nephron loop.

Accepted Answer

ADH (antidiuretic hormone) increases water reabsorption in the kidneys, leading to more concentrated urine. When ADH levels decrease, less water is reabsorbed, resulting in a larger volume of more dilute urine, hence the osmolarity of the urine decreases.