3.9 Composition of the blood
Exam question
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Which component of blood makes up about 55 % of its volume?
(1)Total for this question: 1 mark
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3.9 Composition of the blood
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3.9 Composition of the blood
Exam question
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Name the four main components of blood.
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Total for this question: 4 marks
3.9 Composition of the blood
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Describe how a blood sample can be separated into its components.
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Total for this question: 2 marks
3.9 Composition of the blood
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Which blood component has no nucleus and is a fragment of a cell?
(1)Total for this question: 1 mark
3.9 Composition of the blood
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Blood cell counts per mm³ Component Person A Normal range red blood cells 3 200 000 4 500 000 – 5 500 000 white blood cells 7 000 4 000 – 11 000 platelets 250 000 150 000 – 400 000 Illustrative data, not from a real investigation. Suggest why person A feels tired and breathless when climbing stairs.
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Total for this question: 2 marks
3.9 Composition of the blood
Exam question
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Blood cell counts per mm³ Component Person A Normal range red blood cells 3 200 000 4 500 000 – 5 500 000 white blood cells 7 000 4 000 – 11 000 platelets 250 000 150 000 – 400 000 Illustrative data, not from a real investigation. Calculate how many times more red blood cells than white blood cells person A has.
(2)timesTotal for this question: 2 marks
3.9 Composition of the blood
Exam question
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Blood cell counts per mm³ Component Person A Normal range red blood cells 3 200 000 4 500 000 – 5 500 000 white blood cells 7 000 4 000 – 11 000 platelets 250 000 150 000 – 400 000 Illustrative data, not from a real investigation. Identify which component of person A is within the normal range and involved in clotting.
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Total for this question: 1 mark
3.9 Composition of the blood
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Explain why a blood test for white blood cells can show whether a person has an infection.
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Total for this question: 2 marks
3.9 Composition of the blood
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Compare red blood cells and white blood cells.
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Total for this question: 2 marks
3.9 Composition of the blood
Exam question
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State where red and white blood cells are made.
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Total for this question: 1 mark