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Identify 'X' in the figure… (Class 10 Science 2025, Q23B)

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ScienceCBSE Class 10 · Board exam 2025, set 31/5/1 · 2 marks · Very short answer

CBSE Class 10 Science 2025: question 23(B)

Set in the CBSE Class 10 board exam of 2025, paper 31/5/1, section B, question 23(B), for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q23(B) · 2 marks · Very short answerLife Processes

Identify 'X' in the figure of human nephron shown below. What role does it play in the process of urine formation?

  1. (a)

    Identify 'X' in the figure of human nephron and state its role in the process of urine formation.

    1 mark
  2. (b)

    Why are some substances selectively reabsorbed from the initial filtrate of urine as it flows along the tabular part of nephron?

    1 mark

Figure in the paper: Diagram of a human nephron showing a glomerulus with Bowman's capsule labelled 'X' (arrow points to the capsule enclosing the glomerulus), with the renal tubule and surrounding blood capillaries shown. See it in the official paper.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2025 board paper, set 31/5/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

The cup around the glomerulus has a special name; what passes into it from the glomerulus?

Hint 2

Does the first filtrate contain only waste, or also things the body still needs?

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. (a) X is Bowman's capsule, the cup-shaped start of the nephron that surrounds the glomerulus.

    ½ mark

  2. (a) Role: it collects the filtrate (water, glucose, amino acids, salts and urea) filtered from the blood in the glomerulus.

    ½ mark

  3. (b) The initial filtrate also contains useful substances such as glucose, amino acids, salts and much water. The nephron reabsorbs selectively according to how much excess water is present in the body and how much dissolved waste has to be removed. In this way useful substances are kept in the body and only wastes and extra water leave as urine.

    1 mark

Answer: (a) X = Bowman's capsule; it collects the filtrate from the glomerulus. (b) Reabsorption depends on how much water and useful substances the body needs to retain and how much waste must be removed.

Where the marks are

  • Identifies X as Bowman's capsule (½ mark)
  • States that it collects the filtrate (½ mark)
  • Explains that reabsorption depends on the body's need to retain water and useful substances and remove waste (1 mark)

Revise the chapter

  • Chapter: Life Processes (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Life Processes, one at a time, marked against the answer key and marking points.Back to the full paper2025 board paper, set 31/5/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.