A 51-year-old man with a history of alcoholism presents to the physician because of increasing weakness the past month. Vitals are stable and within normal limits. Serum potassium is 3.0 mEq/L. ECG shows no abnormalities. He is given an IV infusion of potassium and saline. Repeat measurement shows a serum potassium of 3.1 mEq/L. Which of the following is the most likely explanation for these findings?
Decreased activity of renal apical Na+/K+-ATPase pumps
Decreased activity of renal apical ROMK
Decreased activity of renal basolateral Na+/K+-ATPase pumps
Decreased activity of renal basolateral ROMK
Increased activity of renal apical Na+/K+-ATPase pumps
Increased activity of renal apical ROMK
Increased activity of renal basolateral Na+/K+-ATPase pumps
Increased activity of renal basolateral ROMK
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Cut-to-the-chase Answer (0:58):
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HY USMLE Answer (4:48):
