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Q. Which of the following are functions of kidneys?
1. They get rid of waste products carried in the blood
2. They can change blood pressure
3. They help in making red blood cells
4. They produce active vitamin D

Select the correct option from codes given below:

  • (A) 1, 2 & 3 Only
  • (B) 2, 3 & 4 Only
  • (C) 1, 3 & 4 Only
  • (D) 1, 2, 3 & 4
  • Correct Answer - Option(D)
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Explanation by: Admin

The kidneys perform all the functions listed:

They get rid of waste products carried in the blood
– True. Kidneys filter urea, creatinine, and other waste products from the blood and excrete them in urine.

They can change blood pressure
– True. Kidneys regulate blood pressure by adjusting the volume of blood (via water balance) and releasing renin, which controls blood vessel constriction.

They help in making red blood cells
– True. Kidneys release erythropoietin, a hormone that stimulates red blood cell production in the bone marrow.

They produce active vitamin D
– True. Kidneys convert inactive vitamin D into its active form (calcitriol), which is essential for calcium absorption.

Final Answer: (D) 1, 2, 3 & 4

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