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Chapter 5 Practice Paper: Transport in Humans — question paper

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QQ/S3CBI/CH5

Secondary 3 · Combined Science (Biology) (G2 / G3)

Chapter 5 Practice Paper

Transport in Humans

Duration: 40 minutes
Total: 30 marks
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Class:
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READ THESE INSTRUCTIONS FIRST

  • Answer all questions.
  • Section A: choose the one correct answer for each multiple-choice question.
  • Section B: answer in the spaces provided; show all necessary working.
  • Give numerical answers to 3 significant figures where appropriate, with units.
  • Biological drawings are not required; describe or label structures in words where asked.
  • The use of a calculator is permitted.

Original practice material written for the MOE Combined Science (Biology) syllabus. It is not an official MOE or school examination paper. Chapter 5 (main vessels; artery, vein and capillary structure; blood components; heart and valves; coronary heart disease).

For Examiner’s Use
Section A/ 10
Section B/ 20
Total/ 30

Section A: Multiple-choice questions[10 marks]

Choose the one correct answer for each question.

  1. 1

    Blood travels from the heart to the lungs in the

    1. Aaorta
    2. Bpulmonary vein
    3. Chepatic vein
    4. Dpulmonary artery
    ( )
  2. 2

    Which vessel carries nutrient-rich blood from the small intestine to the liver?

    1. Ahepatic portal vein
    2. Bhepatic artery
    3. Crenal vein
    4. Dvena cava
    ( )
  3. 3

    Capillaries are suited to exchange because their walls are

    1. Amuscular
    2. Bone cell thick
    3. Celastic
    4. Dlined with valves
    ( )
  4. 4

    Which blood component helps convert fibrinogen to fibrin?

    1. Ared blood cells
    2. Bwhite blood cells
    3. Cplatelets
    4. Dplasma
    ( )
  5. 5

    A fatty diet raises the risk of coronary heart disease because fats

    1. Athin the blood
    2. Bare deposited in the coronary arteries
    3. Cdamage the lungs directly
    4. Ddestroy red blood cells
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

  1. 1

    The table shows features of blood vessels.

    1. (a)

      State one structural feature of arteries and explain how it suits their function.

      [2]
    2. (b)

      Explain why veins need valves but arteries do not.

      [2]
    3. (c)

      Name the vessel type where exchange of substances with tissues happens, and state the feature that makes it efficient.

      [2]
    4. (d)

      Name the exception among arteries: which one carries deoxygenated blood, and to where?

      [1]
  2. 2

    Blood is a transport tissue with four components.

    1. (a)

      State the role of haemoglobin and the component that contains it.

      [2]
    2. (b)

      List three defence roles of white blood cells.

      [3]
    3. (c)

      Name the two clotting proteins in the order they act.

      [1]
    4. (d)

      State one transport role of plasma.

      [1]
  3. 3

    A 55-year-old smoker with a high-fat diet and little exercise develops chest pain when climbing stairs. The doctor suspects coronary heart disease.

    1. (a)

      Name the vessels affected and state what has happened inside them.

      [2]
    2. (b)

      Explain why the blockage causes chest pain during exercise.

      [2]
    3. (c)

      State three changes to his lifestyle that would reduce the risk, matching one to each cause.

      [2]

— End of paper —