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Excretory Products and their Elimination
Function of the Tubules
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Concepts tested
- Tubular Reabsorption and Secretion
All Questions
2025 1 question
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Which of the following diagrams is correct with regard to the proximal (P) and distal (D) tubule of the Nephron.
PCT reabsorbs electrolytes, water, and $HCO_3^-$ while secreting $H^+$ and $NH_3$; DCT facultatively reabsorbs $NaCl$, water, and $HCO_3^-$ while secreting $K^+$ and $H^+$.
According to the NCERT nephron transport diagram: Proximal Convoluted Tubule (PCT) reabsorbs $HCO_3^-$, $NaCl$, and $H_2O$ and selectively secretes $H^+$ and $NH_3$. Distal Convoluted Tubule (DCT) reabsorbs $NaCl$, $H_2O$, and $HCO_3^-$ and selectively secretes $K^+$ and $H^+$ into the lumen to maintain ionic and acid-base balance.