Question
Which of the following diagrams is correct with regard to the proximal (P) and distal (D) tubule of the Nephron.
NEET
Zoology
Excretory Products and their Elimination
2025
NEET 2025
NEET Zoology Question (2025) — Solution
Options
- A.
- B.
- C.
- D.
Answer
B.
Step-by-step solution
During urine formation, the tubular cells secrete substances like H ^ + , K ^ + and ammonia into the filtrate. Tubular secretion is also an important step in urine formation as it helps in the maintenance of ionic and acid base balance of body fluids. PCT Selective secretion of H ^ + , ammonia and K ^ + into the filtrate. DCT Capable of reabsorption of HCO _3^ - and selective secretion of H ^ + , K ^ + and NH _3.
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