🔬 Science & TechnologyUPSC 2003Space & Space Technology

With reference to the work of human kidney, consider the following statements1. After the waste is removed in the kidney, the clean blood is sent back through renal artery.2. From Bowman’s capsule, the filtered liquid passes through tiny tubes where much of the glucose is reabsorbed and sent back to the blood in the renal vein. Which of these statements is/are correct?

aOnly 1
bOnly 2
cBoth 1 and 2
dNeither 1 nor 2
✓ Correct answer: b) Only 2
ExplanationStatement 1 is incorrect: The renal artery is responsible for delivering oxygenated blood from the heart to the kidneys for filtration.After the kidneys filter the blood by removing waste products and excess substances, the cleansed blood is returned to the systemic circulation via the renal vein, not the renal artery.Statement 2 is correct: From Bowman’s capsule, the glomerular filtrate(filtered liquid) passes into the proximal convoluted tubule (PCT), where essential substances, including glucose, are actively reabsorbed.This reabsorbed glucose along with other nutrients is then transported into the peritubular capillaries and eventually returned to the bloodstream via the renal vein.This ensures that the body retains necessary nutrients while excreting waste.452

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