3.12 White blood cells and the immune response
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Which type of white blood cell engulfs pathogens?
(1)Total for this question: 1 mark
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3.12 White blood cells and the immune response
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3.12 White blood cells and the immune response
Exam question
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What do lymphocytes produce?
(1)Total for this question: 1 mark
3.12 White blood cells and the immune response
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Describe how a phagocyte destroys a bacterium.
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Total for this question: 3 marks
3.12 White blood cells and the immune response
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Explain how lymphocytes help to destroy pathogens.
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Total for this question: 3 marks
3.12 White blood cells and the immune response
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State what is meant by the term antigen.
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Total for this question: 1 mark
3.12 White blood cells and the immune response
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Explain why an antibody against measles does not protect against chickenpox.
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Total for this question: 2 marks
3.12 White blood cells and the immune response
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Compare phagocytes and lymphocytes.
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Total for this question: 3 marks
3.12 White blood cells and the immune response
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Explain why phagocytes contain many lysosomes containing enzymes.
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Total for this question: 2 marks
3.12 White blood cells and the immune response
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Explain why the number of white blood cells rises during an infection.
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Total for this question: 2 marks
3.12 White blood cells and the immune response
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Illustrative data from a model of the immune response.
Antibody concentration after first infection with a virus Day Antibody / arbitrary units 0 0 5 2 10 18 15 30 20 22 30 8 Illustrative data, not from a real investigation. Plot a graph of antibody concentration against time. Join your points with straight lines using a ruler.
(5)Graph skills: SLAPUK and choosing a scale
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Total for this question: 5 marks
3.12 White blood cells and the immune response
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Antibody concentration after first infection with a virus Day Antibody / arbitrary units 0 0 5 2 10 18 15 30 20 22 30 8 Illustrative data, not from a real investigation. Explain why there is a delay before antibody concentration increases.
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Total for this question: 2 marks
3.12 White blood cells and the immune response
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Antibody concentration after first infection with a virus Day Antibody / arbitrary units 0 0 5 2 10 18 15 30 20 22 30 8 Illustrative data, not from a real investigation. Suggest why the person felt ill between day 3 and day 12.
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Total for this question: 2 marks
3.12 White blood cells and the immune response
Exam question
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Antibody concentration after first infection with a virus Day Antibody / arbitrary units 0 0 5 2 10 18 15 30 20 22 30 8 Illustrative data, not from a real investigation. Explain why antibody concentration falls after day 15.
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Total for this question: 2 marks
3.12 White blood cells and the immune response
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Which statement about antibodies is correct?
(1)Total for this question: 1 mark
3.12 White blood cells and the immune response
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Describe how antibodies help phagocytes.
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Total for this question: 2 marks