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Science · 2025 · 2 marks
CBSE 2025 · Region 5 · Set 1 · Q23
(A) How is lymph formed? State its important function.
How is lymph formed ? State its important function.
(a)
Identify 'X' in the figure of human nephron shown below. What role does it play in the process of urine formation?
(b)
Why some substances are selectively reabsorbed from the initial filtrate of urine, as it flows along the tabular part of nephron ?
Marking-scheme solution
(A) •Through the pores present in the walls of capillaries some amount of plasma, proteins and blood cells escape into intercellular spaces in the tissue to form the tissue fluid called lymph.
-Lymph carries digested and absorbed fat from intestine/ drains excess
fluid from extracellular space back into the blood.(B) (a) X- Bowman's capsule; Function: collects the filtrate
(b) It is because the nephron monitors how much excess water is there in the body and how much dissolved waste is to be removed or how much useful substances are retained by the body.
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CBSE Class 10 Science past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.