Question:medium
Which of the following diagrams is correct with regard to the proximal (P) and distal (D) tubule of the nephron?
Which of the following diagrams is correct with regard to the proximal (P) and distal (D) tubule of the nephron?
Show Hint
In the nephron, the proximal tubule reabsorbs a large portion of solutes, while the distal tubule fine-tunes ion and pH balance. Pay attention to these key functions when analyzing nephron diagrams.
Updated On: Nov 26, 2025
Hide Solution
The Correct Option is C
Solution and Explanation
The proximal tubule (P) substantially reabsorbs filtrate, encompassing water, sodium chloride, bicarbonate, and nutrients, while also secreting hydrogen ions (H+) for acid-base regulation.The distal tubule (D) fine-tunes ion exchange and pH balance. It reabsorbs sodium and bicarbonate, and secretes potassium (K+) and hydrogen ions.Diagram (3) correctly illustrates the functions of both the proximal and distal tubules within the nephron.Therefore, diagram (3) is the correct representation.
Was this answer helpful?
0