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Name the hormone released and… (Class 10 Science 2023, Q30)

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ScienceCBSE Class 10 · Board exam 2023, set 31/2/1 · 3 marks · Short answer

CBSE Class 10 Science 2023: question 30

Set in the CBSE Class 10 board exam of 2023, paper 31/2/1, section C, question 30, for 3 marks. Try it first; the hints and our step-by-step solution are below.

Q30 · 3 marks · Short answerControl and Coordination

Name the hormone released and the gland which secretes it in human beings during scary situations. How does the body respond to enable it to deal with the situation ?

Source: official question paper from cbse.gov.in (PDF). See it in the full 2023 board paper, set 31/2/1.

Hints

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

Hint 1

This is often called the 'fight or flight' hormone.

Hint 2

The gland that secretes it sits on top of the kidneys.

Hint 3

Think about what happens to your heart, your breathing and the blood flow to your muscles when you are frightened.

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. The hormone released in scary situations is adrenaline.

    ½ mark

  2. Adrenaline is secreted by the adrenal glands, which lie on top of the kidneys.

    ½ mark

  3. Response 1: The heart beats faster, so more oxygen is supplied to the muscles. The breathing rate also increases because of contraction of the diaphragm and rib muscles.

    1 mark

  4. Response 2: Blood supply to the digestive system and skin is reduced, and blood is diverted to the skeletal muscles. This prepares the body to fight or run away.

    1 mark

Answer: Adrenaline, from the adrenal glands; faster heartbeat and breathing, and blood diverted from the digestive system and skin to the skeletal muscles

Where the marks are

  • Names adrenaline (½ mark)
  • Names the adrenal gland (½ mark)
  • Any two responses, e.g. faster heartbeat, increased breathing rate, blood diverted to skeletal muscles (1 + 1 marks)

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 31/2/1: 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.