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2.3 The nervous system and brain

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Question 10

A patient completed a symbol-matching task before and after an eight-week practice programme. The PET tracer uptake is given as a percentage of the mean uptake in healthy people completing the same task.

Time of scanCT result for region RPET tracer uptake in region R / % of healthy meanCorrect responses / %
before the programmeno visible structural abnormality4837
after the programmeno visible structural abnormality7670

A researcher concluded that the programme repaired tissue in region R and that this repair caused the patient's performance to improve.

Evaluate the researcher's conclusion. Use the information in the table and your knowledge of CT and PET scanning.

[4]
Markscheme

2.3 The nervous system and brain Questions

  1. GCSE
  2. /Biology
  3. /2.3 The nervous system and brain

111 exam-style questions on Edexcel GCSE Biology 2.3 The nervous system and brain, covering 2.3.1 Structures and functions of the brain, 2.3.2 Imaging brain function with scanning, 2.3.3 Limitations in treating nervous system damage, 2.3.4 Neurones and impulse transmission, and 2.3.5 Structure and function of a reflex arc. Each one has a worked solution and a mark scheme showing where the marks go.

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