What correlates with high blood volume regarding ADH secretion?

The secretion of Antidiuretic Hormone (ADH), also known as vasopressin, is closely regulated by the body's hydration status and blood volume. When blood volume is high, the body typically senses this increase primarily through baroreceptors located in the cardiovascular system. These baroreceptors detect the stretching of blood vessels that occurs with higher volume.

In response to high blood volume, the body decreases the secretion of ADH because its primary role is to promote water reabsorption in the kidneys, thereby concentrating urine and reducing water excretion. When blood volume is adequate or excessive, the need for reabsorption diminishes, resulting in lower levels of ADH. This feedback mechanism helps maintain homeostasis and ensures that the kidneys do not retain excessive water, which could lead to further increases in blood volume and potential complications like hypertension.

Thus, decreased secretion of ADH is directly correlated with high blood volume, as the body works to regulate and maintain proper fluid balance.