In the context of decreased ADH (antidiuretic hormone) levels in the blood, select the option that accurately describes the effect on urine volume:
Urine volume experiences a marked increase.
Urine volume undergoes a significant decrease.
Urine volume remains within the normal range.
Urine volume remains unaffected.
Option 1 states that when the level of ADH in the blood is less, the volume of urine increases. This is because ADH plays a crucial role in regulating the reabsorption of water in the kidneys. When ADH levels are low, the kidneys are less able to reabsorb water resulting in a larger volume of urine being produced and excreted from the body. Therefore, option 1 correctly describes the effect of decreased ADH levels on urine volume.