What are the physiological roles of Arginine Vasopressin?

Arginine Vasopressin, also known as antidiuretic hormone (ADH), plays significant physiological roles primarily in regulating blood pressure and fluid balance within the body. It promotes water reabsorption in the kidneys, which helps to concentrate urine and maintain adequate hydration levels. When the body is dehydrated, Arginine Vasopressin is released, aiding in fluid retention, thereby preventing a drop in blood volume and blood pressure. This regulation is crucial during pregnancy, as maintaining proper hydration and blood pressure is vital for both maternal and fetal health.

While other options mention mechanisms that may involve various hormones or physiological processes, only the regulation of blood pressure and fluid balance accurately reflects the primary roles of Arginine Vasopressin in the body.