A new drug has been shown to block epithelial sodium channels in the cortical collecting duct. Which of the following is most likely to be decreased upon drug administration?
AUrea reabsorption in the collecting tubules
BHydrogen ion secretion in the collecting tubules
CPotassium secretion in the collecting tubules
DSodium secretion in the collecting tubules
ESodium chloride reabsorption in the distal tubule
Which hormone's secretion is primarily stimulated by increased plasma osmolality?
AEPO
BPTH
CADH
DAldosterone
EANP
A new drug X is being tested for its effect on renal function. During the experiments, the researchers found that in patients taking substance X, the urinary concentration of sodium decreases while urine potassium concentration increase. Which of the following affects the kidneys in the same way as does substance X?
AAldosterone
BFurosemide
CSpironolactone
DAtrial natriuretic peptide
EHydrochlorothiazide
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