Given below are two statements.
Statement I: Conditional reabsorption of H₂O and NaCl takes place in DCT.
Statement II: At DCT, HCO^–₃ ions are not reabsorbed.
In the light of the above statements, choose the correct answer from the options given below.

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Statement I is incorrect but statement II is correct.

Both statement I and statement II are correct.

Statement I is correct but statement II is incorrect.

Both statement I and statement II are incorrect.

answer is C.

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Detailed Solution

Statement I is correct. Conditional reabsorption of H₂O and NaCl takes place in DCT. ADH aids in this conditional reabsorption of water. Sodium reabsorption is mainly due to aldosterone.

Statement II is incorrect. At DCT, HCO₃^– ions are reabsorbed. DCT is also capable of selective secretion of hydrogen and potassium ions and NH₃ to maintain the pH and sodium-potassium balance in blood.

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