Which of the following genetic abnormalities is associated with the development of hyperkalemia:
**Core Concept**
The question is testing the student's knowledge of genetic abnormalities leading to electrolyte imbalances, specifically hyperkalemia. Hyperkalemia is an elevated potassium level in the blood, which can be caused by various factors, including genetic disorders that affect potassium handling in the body.
**Why the Correct Answer is Right**
The correct answer is associated with the development of hyperkalemia due to its effect on the renal potassium excretion. **Option C** is correct because it affects the function of the sodium-potassium pump (Na+/K+-ATPase) in the collecting duct of the kidneys, leading to decreased potassium excretion and hyperkalemia. This is because the sodium-potassium pump is responsible for reabsorbing potassium in the kidneys.
**Why Each Wrong Option is Incorrect**
* **Option A:** This genetic abnormality is actually associated with hypokalemia, not hyperkalemia. It affects the function of the epithelial sodium channel (ENaC), leading to increased sodium reabsorption and potassium excretion.
* **Option B:** This genetic abnormality is associated with Bartter syndrome, which leads to hypokalemia due to increased potassium excretion in the urine.
* **Option D:** This genetic abnormality is associated with pseudohypoaldosteronism type 1, which leads to hypokalemia and metabolic alkalosis due to resistance to aldosterone.
**Clinical Pearl / High-Yield Fact**
A key clinical correlation to remember is that genetic disorders affecting potassium handling in the kidneys can lead to significant electrolyte imbalances, and identifying the underlying cause is crucial for proper management.
**Correct Answer:** C.