Which statement best describes a feature that is not typical of diabetes insipidus?

Which statement best describes a feature that is not typical of diabetes insipidus?

• A. Polyuria
• B. Hypoglycemia
• C. Polydipsia
• D. Hypernatremia

Answer: (B)

Diabetes insipidus causes excessive free-water loss because ADH can’t properly act on the kidney’s collecting ducts. The classic features are large volumes of dilute urine (polyuria) and the body's attempt to balance water by drinking a lot (polydipsia). If the water loss isn’t matched by intake, serum osmolality rises and people can become hypernatremic. Glucose regulation, however, is not affected in DI—blood sugar levels remain normal because the underlying problem is water handling, not insulin or glucose metabolism. Hypoglycemia is not a feature of diabetes insipidus, whereas the other findings fit with the disorder’s water-handling issue.

Diabetes insipidus causes excessive free-water loss because ADH can’t properly act on the kidney’s collecting ducts. The classic features are large volumes of dilute urine (polyuria) and the body's attempt to balance water by drinking a lot (polydipsia). If the water loss isn’t matched by intake, serum osmolality rises and people can become hypernatremic. Glucose regulation, however, is not affected in DI—blood sugar levels remain normal because the underlying problem is water handling, not insulin or glucose metabolism. Hypoglycemia is not a feature of diabetes insipidus, whereas the other findings fit with the disorder’s water-handling issue.