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Write one specific function… (Class 10 Science 2023, Q23)

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ScienceCBSE Class 10 · Board exam 2023, set 31/4/1 · 2 marks · Very short answer

CBSE Class 10 Science 2023: question 23

Set in the CBSE Class 10 board exam of 2023, paper 31/4/1, section B, question 23, for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q23 · 2 marks · Very short answerLife Processes

Write one specific function each of the following organs in relation with excretion in human beings :

  1. (i)

    Renal Artery

    ½ mark
  2. (ii)

    Urethra

    ½ mark
  3. (iii)

    Glomerulus

    ½ mark
  4. (iv)

    Tubular part of nephron

    ½ mark

Source: official question paper from cbse.gov.in (PDF). See it in the full 2023 board paper, set 31/4/1.

Hints

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

Hint 1

Follow the path of blood into the kidney and of urine out of the body.

Hint 2

The glomerulus is a cluster of capillaries inside Bowman's capsule. What does it do to blood?

Hint 3

The filtrate contains useful substances too. Which part takes them back?

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) Renal artery: brings blood containing nitrogenous wastes (urea) into the kidney for filtration.

    ½ mark

  2. (ii) Urethra: carries urine out of the body from the urinary bladder.

    ½ mark

  3. (iii) Glomerulus: filters blood. Water, urea, glucose and salts pass into Bowman's capsule.

    ½ mark

  4. (iv) Tubular part of nephron: selectively reabsorbs useful substances such as glucose, amino acids, salts and water back into the blood.

    ½ mark

Answer: (i) Brings waste-laden blood to kidney; (ii) Passes urine out; (iii) Filtration of blood; (iv) Selective reabsorption

Where the marks are

  • Renal artery brings blood with nitrogenous waste to kidney (½ mark)
  • Urethra passes urine out (½ mark)
  • Glomerulus filters blood (½ mark)
  • Tubule selectively reabsorbs useful substances (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 paper2023 board paper, set 31/4/1: 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.