Renal physiology: acid-base handling: practice question

The best answer is D, Proximal convoluted tubule. Most filtered bicarbonate is reclaimed in the proximal convoluted tubule through carbonic anhydrase-dependent processes.

Thick ascending limb reabsorbs salt but not most bicarbonate.

Collecting duct fine-tunes acid-base balance.

Thin descending limb is highly water permeable.

It tests Renal physiology: acid-base handling in Physiology. Distal nephron segments fine-tune acid excretion and bicarbonate handling.

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

For each system, sketch the key graph (pressure–volume loop, oxygen dissociation curve, nephron handling) and explain it aloud. Then use the flashcards and the other Physiology questions on this site to test what stuck.

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.