The reabsorption of filtered $\mathrm{HCO}_{3}^{-}$

Question

Quizplus · Accepted Answer

[IX C $1 \mathrm{a}, \mathrm{b}$ ]. Decreases in arterial $\mathrm{Pco}_{2}$ cause a decrease in the reabsorption of filtered $\mathrm{HCO}_{3}{ }^{-}$by diminishing the supply of $\mathrm{H}^{+}$in the cell for secretion into the lumen. Reabsorption of filtered $\mathrm{HCO}_{3}{ }^{-}$is nearly $100 \%$ of the filtered load and requires carbonic anhydrase in the brush border to convert filtered $\mathrm{HCO}_{3}{ }^{-}$to $\mathrm{CO}_{2}$ to proceed normally. This process causes little acidification of the urine and is not linked to net excretion of $\mathrm{H}^{+}$as titratable acid or $\mathrm{NH}_{4}{ }^{+}$.

The Reabsorption of Filtered HCO3−\mathrm{HCO}_{3}^{-}HCO3−​ A) Results in Reabsorption of Less Than

The Reabsorption of Filtered $\mathrm{HCO}_{3}^{-}$ A) Results in Reabsorption of Less Than