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Answer the following. (Class 10 Science 2023, Q22)

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ScienceCBSE Class 10 · Board exam 2023, set 31/1/1 · 2 marks · Very short answer

CBSE Class 10 Science 2023: question 22

Set in the CBSE Class 10 board exam of 2023, paper 31/1/1, section B, question 22, for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q22 · 2 marks · Very short answerControl and Coordination

Answer the following.

  1. (a)

    Write the role of insulin in regulating blood sugar levels in human body. Mention the disease caused due to it.

    0 marks
  2. (b)

    How is the timing and the amount of release of insulin in the blood regulated ?

    0 marks

Source: official question paper from cbse.gov.in (PDF). See it in the full 2023 board paper, set 31/1/1.

Hints

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

Hint 1

Does insulin raise or lower blood glucose?

Hint 2

Think of feedback: the level of sugar itself controls how much insulin is released.

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) Insulin, secreted by the pancreas, lowers the blood sugar level by helping body cells take up and use glucose.

    ½ mark

  2. (a) Too little insulin raises the blood sugar level and causes diabetes.

    ½ mark

  3. (b) Insulin release is controlled by a feedback mechanism. When the blood sugar level rises, the pancreas detects it and secretes more insulin. As the sugar level falls, insulin secretion is reduced.

    1 mark

Answer: (a) Insulin lowers blood sugar; its deficiency causes diabetes; (b) a feedback mechanism: rising sugar increases insulin release and falling sugar reduces it

Where the marks are

  • States insulin lowers blood sugar (½ mark)
  • Names diabetes (½ mark)
  • Explains feedback mechanism (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 paper2023 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.