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Electrical impulse is an… (Class 10 Science 2026, Q10b)

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ScienceCBSE Class 10 · Board exam 2026, set 31/2/1 · 2 marks · Very short answer

CBSE Class 10 Science 2026: question 10(b)

Set in the CBSE Class 10 board exam of 2026, paper 31/2/1, section A, question 10(b), for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q10(b) · 2 marks · Very short answerControl and Coordination

Electrical impulse is an excellent means to transmit information in the animal body, but there are some limitations to the use of electrical impulses. State any two limitations.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 31/2/1.

Hints

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

Hint 1

Do nerves reach every single cell of the body?

Hint 2

Think about what a cell must do before it can send the next impulse.

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. Limitation 1: Electrical impulses reach only those cells that are connected by nervous tissue. They cannot reach every cell of the animal body.

    1 mark

  2. Limitation 2: After a cell generates and transmits an impulse, it needs some time to reset its mechanism before it can send a new one. So electrical impulses cannot be transmitted continuously.

    1 mark

Answer: (1) Impulses reach only cells connected by nervous tissue; (2) cells need time to reset after each impulse, so transmission is not continuous.

Where the marks are

  • Impulses reach only cells connected to nervous tissue (1 mark)
  • Cells need time to reset before the next impulse, so transmission is not continuous (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Control and Coordination, one at a time, marked against the answer key and marking points.Back to the full paper2026 board paper, set 31/2/1: 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.