What mechanisms cause hypernatremia?
A) Syndrome of inappropriate antidiuretic hormone (SIADH)
B) Cushing's disease and hyperaldosteronism
C) Prolonged vomiting or diarrhea
D) Excessive diuretic therapy

Question

Quizplus · Accepted Answer

Both Cushing's disease and hyperaldosteronism can cause hypernatremia by increasing sodium reabsorption in the kidneys.

Answer: C
 Prolonged vomiting or diarrhea can cause hypernatremia due to loss of fluid and electrolytes, leading to a relative increase in sodium concentration in the body.

Answer: D
 Excessive diuretic therapy can cause hypernatremia by increasing sodium concentration in the body as excess water is eliminated along with sodium.

Answer: A
 SIADH causes hyponatremia, not hypernatremia.

What Mechanisms Cause Hypernatremia