Renal System MCAT Practice Question
A patient presents with hyperkalemia and metabolic acidosis. Laboratory tests reveal reduced GFR and elevated serum creatinine. The kidneys show decreased ammonia excretion and impaired H+ secretion in collecting ducts. The patient's condition is most consistent with dysfunction of which renal structure, given its role in acid-base homeostasis and electrolyte regulation?
Answer choices
- AProximal convoluted tubule
- BLoop of Henle
- CCollecting ductCorrect answer
- DDistal convoluted tubule
- EBowman's capsule
- FJuxtaglomerular apparatus
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