Biology : Life Processes In Living Organisms

Q 8 / 16

UPSC CSE Prelims 2003

With reference to the work of human kidney, consider the following statements

  1. 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?

EXPLANATION

The correct option is Only 2.

Explanation

The kidney filters blood through nephrons, involving processes of filtration, reabsorption, and secretion.

  • Statement 1: Incorrect – Clean (filtered) blood leaves the kidney through the renal vein, not the renal artery. The renal artery carries unfiltered blood into the kidney.
  • Statement 2: Correct – After filtration in Bowman's capsule, the filtrate passes through renal tubules where essential substances such as glucose are reabsorbed into the blood and eventually returned via the renal vein.

Key Takeaway: Renal artery brings unfiltered blood to the kidney, while renal vein carries purified blood away after filtration and reabsorption processes.

SOURCENCERT Class 11 Biology Chapter 19: Excretory Products and their Elimination