ADH is a hormone released by the pituitary gland that plays a key role in maintaining water balance in the body by regulating how much water is reabsorbed from the renal tubules.
Table 1 shows the physiological effects of different plasma concentrations of ADH in a healthy adult male.
Table 1
| Plasma ADH concentration (ng/dm3\text{ng/dm}^3ng/dm3) | Concentration of dissolved solutes in urine (mOsm/kg\text{mOsm/kg}mOsm/kg) | Rate of urine production (cm3/minute\text{cm}^3/\text{minute}cm3/minute) |
|---|---|---|
| 0.8 | 250 | 15.0 |
| 1.6 | 500 | 9.5 |
| 2.4 | 800 | 5.2 |
| 3.2 | 1100 | 2.1 |
| 4.8 | 1300 | 0.8 |
During a physiological study, the participant's plasma ADH concentration increased from 1.6 ng/dm31.6\text{ ng/dm}^31.6 ng/dm3 to 3.2 ng/dm33.2\text{ ng/dm}^33.2 ng/dm3.
Explain how this increase in the concentration of ADH causes the changes to the urine shown in Table 1.