What is a consequence of low antidiuretic hormone (ADH) levels?

Low levels of antidiuretic hormone (ADH), also known as vasopressin, lead to increased thirst. ADH plays a critical role in regulating water balance in the body by promoting water reabsorption in the kidneys. When ADH levels are low, less water is reabsorbed, resulting in the production of more dilute urine and increased urinary output. This loss of water can lead to dehydration, prompting the body to signal an increase in thirst to encourage the intake of fluids.

Consequently, the sensation of thirst becomes pronounced, as the body attempts to restore its fluid balance and address the deficit created by the excessive urine output. This physiological response is crucial for regulating hydration and maintaining homeostasis in the body. It is also worth noting that other options like decreased thirst or increased concentration of urine would not occur under low ADH conditions, as the hormone's primary function is to enhance water retention and concentration of urine.