Question

Is bicarbonate more concentrated outside the membrane?

Answer 1

In the kidney, bicarbonate ions are more concentrated outside the membrane of the proximal convoluted tubules (PCT).

Step-by-step explanation:

In the kidney, there is a higher concentration of bicarbonate outside the membrane compared to inside. Bicarbonate ions are conserved and transported across the membrane to the interstitial space surrounding the proximal convoluted tubules (PCT).