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O LevelBiologyCambridgeExam Questions11. Transport in Humans11.2 The Heart

The Heart (Cambridge O Level Biology)

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11.2 The Heart

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11.2 The Heart

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1
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Which of the following is a method that a doctor would suggest to a patient to reduce their risk of developing coronary heart disease?

  • Inserting a stent

  • Coronary heart bypass surgery

  • Angioplasty

  • Controlled exercise

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2
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Which row of the table below shows the correct chambers of the heart, from those with the thinnest walls to those with the thickest?

  thinnest → thickest
A left ventricle right ventricle left atrium
B left atrium left ventricle right ventricle
C right ventricle left atrium left ventricle
D left atrium right ventricle left ventricle

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    1
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    The diagram below shows a vertical section through a human heart.

    9-q7--heart-outline

    Which row of the following table has the correct names for the structures labelled in the diagram?

      X Y Z
    A atrioventricular valve semilunar valve septum
    B semilunar valve atrioventricular valve septum
    C semilunar valve semilunar valve atrioventricular valve
    D atrioventricular valve atrioventricular valve septum

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      21 mark

      What is the sequence of contractions in one heartbeat?

      • left atrium and left ventricle together, pause, right atrium and right ventricle together

      • left atrium, left ventricle, right atrium, right ventricle, pause

      • right atrium and left atrium together, right ventricle and left ventricle together, pause

      • right atrium, right ventricle, left atrium, left ventricle, pause

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      1
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      Four different stages in one heartbeat are shown in the diagram below.

      9-q13-heart-cycle

      Which of the following depicts a correct order of stages?

      • W→ X → Y → Z

      • X → Z → W → Y

      • W → Y → Z → X

      • X → W → Y → Z

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      21 mark

      The diagram shows a section through the human heart. q14-11-2-the-heart-translocation-medium-mcq-cie-o-level-biology

      What will be the state of the valves when the walls of chambers X and Y are contracting?

        valves
        1 2 3 4
      A closed open open closed
      B closed open closed open
      C open closed open closed
      D open closed closed open

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