ADH is a hormone made by the pituitary gland that regulates the water balance in the body.
ADH controls how much water is reabsorbed from the kidney tubules.
Table 1 shows the effects of different blood concentrations of ADH.
Table 1
| Concentration of ADH in the blood in ng/dm3\text{ng/dm}^3ng/dm3 | Concentration of dissolved substances in urine in arbitrary units | Rate of urine production in cm3/minute\text{cm}^3/\text{minute}cm3/minute |
|---|---|---|
| 0.5 | 300 | 12.0 |
| 1.0 | 600 | 8.0 |
| 2.0 | 850 | 4.8 |
| 3.0 | 1050 | 2.5 |
| 4.0 | 1150 | 1.2 |
A woman's blood ADH concentration increased from 1.0 ng/dm31.0\text{ ng/dm}^31.0 ng/dm3 to 3.0 ng/dm33.0\text{ ng/dm}^33.0 ng/dm3.
Explain how this increase in the concentration of ADH causes the changes to the urine shown in Table 1.