Renal Regulation of Sodium & Potassium — Practice
A physiologist studies a segment of the nephron that is impermeable to water even in the presence of vasopressin and actively reabsorbs sodium, potassium and chloride together, contributing to the medullary osmotic gradient. A loop diuretic is most likely to act on the transporter in this segment. Which segment is being described?
AThick ascending limb of the loop of Henle
BThin descending limb of the loop of Henle
CCortical collecting duct
DProximal convoluted tubule