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NEET Biology Excretory Products and their Elimination Question Bank Self Evaluation Test - Excretory Products and their Elimination

  • question_answer
    Directions for (Qs. 96 to 99): Refer the given figure of nephron showing blood vessels and duct and answer the questions.
                 
    Which part is capable of reabsorption of \[HC{{O}^{-}}_{3}\] and selective secretion of hydrogen and potassium ions and \[N{{H}_{3}}\] to maintain the pH and sodium-potassium balance in blood?

    A) 1                                             

    B) 3

    C) 5

    D)                    7

    Correct Answer: D

    Solution :

    [d] Distal convoluted tubule (DCT) is marked as 7. The DCT is an important site for the active secretion of ions, acids, drugs, & toxins and the selective reabsorption of sodium ions from the tubular fluid. In the final portions of the DCT, an osmotic flow of water assists in concentrating the tubular fluid.


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