Blood tests to measure the number of white blood cells (leucocytes) are often used to indicate infection and/or illness - Scottish Highers Human Biology - Question 20 - 2015
Question 20
Blood tests to measure the number of white blood cells (leucocytes) are often used to indicate infection and/or illness.
Leucopenia, due to starvation or malnutriti... show full transcript
Worked Solution & Example Answer:Blood tests to measure the number of white blood cells (leucocytes) are often used to indicate infection and/or illness - Scottish Highers Human Biology - Question 20 - 2015
Step 1
Identify the Graphs
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Answer
We analyze each graph to determine the behavior of white blood cell counts over time for the patients W, X, Y, and Z.
Step 2
Graph W
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Answer
Graph W shows a gradual increase in the white blood cell count over the 20-week period, indicating Leukaemia, as the count is permanently increasing.
Step 3
Graph X
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Answer
Graph X illustrates fluctuating white blood cell counts, with temporary peaks and troughs, which aligns with the characteristics of Leucocytosis.
Step 4
Graph Y
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Answer
Graph Y displays a white blood cell count that eventually drops below the normal range, consistent with Leucopenia.
Step 5
Graph Z
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Graph Z shows a stable white blood cell count that remains within normal ranges, confirming it is not associated with any of the conditions listed.
Step 6
Final Identification
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Answer
Based on the analysis, the identification of patients is as follows: W is Leukaemia, X is Leucocytosis, and Y is Leucopenia.
Thus, the answer is C: W, Y, Z.
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