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Besides minimising the loss… (Class 10 Science 2025, Q23a)

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

CBSE Class 10 Science 2025: question 23(a)

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

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

Besides minimising the loss of blood, why is it essential to plug any leak in a blood vessel? Name the component of blood which helps in this process and state how this component perform this function.

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

Hints

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

Hint 1

What happens to pressure in a pipe system with a leak?

Hint 2

Which blood cells help in clotting?

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. Plugging the leak stops the blood pressure from falling, which keeps the pumping system working efficiently.

    1 mark

  2. Component: blood platelets.

    ½ mark

  3. Function: platelets help the blood clot at the site of injury, which plugs the leak.

    ½ mark

Answer: Prevents fall in blood pressure / maintains pumping efficiency; platelets, which clot blood at the injury site

Where the marks are

  • Explains that plugging maintains blood pressure and pumping efficiency (1 mark)
  • Names platelets (½ mark)
  • States that they help clot blood at the site of injury (½ 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 31/1/1: 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.