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Taking the example of any two… (Class 10 Science 2024, Q29)

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ScienceCBSE Class 10 · Board exam 2024, set 31/5/1 · 3 marks · Short answer

CBSE Class 10 Science 2024: question 29

Set in the CBSE Class 10 board exam of 2024, paper 31/5/1, section C, question 29, for 3 marks. Try it first; the hints and our step-by-step solution are below.

Q29 · 3 marks · Short answerControl and Coordination

Taking the example of any two animal hormones along with their gland of secretion, explain how these hormones help (i) in growth and development and (ii) regulate metabolism, in the body.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 31/5/1.

Hints

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

Hint 1

Think of a hormone whose deficiency causes dwarfism, and one that needs iodine to be made.

Hint 2

The 'master gland' at the base of the brain controls growth. A gland in the neck controls metabolism of food.

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. (i) Growth and development: Growth hormone,

    ½ mark

  2. secreted by the pituitary gland.

    ½ mark

  3. It regulates growth and development of the body, stimulating growth in all organs. Its deficiency in childhood causes dwarfism.

    ½ mark

  4. (ii) Regulation of metabolism: Thyroxin,

    ½ mark

  5. secreted by the thyroid gland.

    ½ mark

  6. It regulates carbohydrate, protein and fat metabolism in the body so as to provide the best balance for growth. Iodine is needed to make it.

    ½ mark

Answer: (i) Growth hormone, pituitary gland: stimulates growth of all organs; (ii) Thyroxin, thyroid gland: regulates carbohydrate, protein and fat metabolism.

Where the marks are

  • Names growth hormone (½ mark)
  • Names the pituitary gland as its source (½ mark)
  • States its role in growth (½ mark)
  • Names thyroxin (½ mark)
  • Names the thyroid gland as its source (½ mark)
  • States its role in carbohydrate, protein and fat metabolism (½ 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 paper2024 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.