Final answer:
Concentrated ADH can increase blood pressure and volume due to higher water reabsorption by the kidneys, whereas dilute ADH results in decreased blood pressure and volume from lower water reabsorption.
Step-by-step explanation:
Antidiuretic Hormone (ADH) regulates the body's water balance by affecting the kidneys. When ADH concentration is elevated, it leads to increased water reabsorption in the kidneys, which decreases urine volume and can increase blood volume and blood pressure. Conversely, when ADH is diluted, less water is reabsorbed by the kidneys, resulting in increased urine output, potentially lowered blood volume, and decreased blood pressure. Consequently, lab work affected by concentrated or diluted ADH would show changes in blood volume and pressure rather than changes in sodium (Na+) or potassium levels directly. Further, aldosterone regulation also plays a role in maintaining sodium and potassium balance, and it's affected by changes in blood volume and pressure as well, not ADH directly.