| I: | Thyroid hormones play an important role in the regulation of the basal metabolic rate. |
| II: | Thyroid hormones are most important factors that affect the process of red blood cell formation. |
| III: | Thyroid hormones control the metabolism of carbohydrates but not of proteins and fats. |
| IV: | Maintenance of water and electrolyte balance is also influenced by thyroid hormones. |
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |