Tubular Reabsorption & Secretion — Topic Test
11 questions · exam mode (answers revealed at the end). 18 min suggested.
A 24-year-old trekker rapidly ascends to 4500 m and over the next two days develops increased ventilation with an arterial pH of 7.48 and PaCO2 of 28 mmHg. Renal compensation now begins to normalise the pH. Which tubular change is chiefly responsible for this compensation?
AIncreased bicarbonate reabsorption in the proximal tubule
BIncreased hydrogen ion secretion in the collecting duct
CDecreased bicarbonate reabsorption with increased excretion
DIncreased ammonium generation in the proximal tubule