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Date May 2018 Marks available 1 Reference code 18M.3.HL.TZ1.5
Level Higher level Paper Paper 3 Time zone Time zone 1
Command term Suggest Question number 5 Adapted from N/A

Question

The brain requires a large energy input. Suggest one reason for this.

[1]
b.

Outline the functional magnetic resonance imaging (fMRI) technique for brain research.

[2]
c.

Markscheme

a. brain cells/neurons carry out large amount of metabolic activity 

b. maintenance of resting potential requires energy/ATP
OR
functioning of Na-K pumps requires energy/ATP

b.

a. (measures brain activity by) detecting changes associated with blood flow 

b. more active parts of brain receive more blood flow 

c. activity leads to change in magnetization between oxygen-rich and oxygen-poor blood 

d. scans/images are taken while the subject is exposed to a stimulus/activity

c.

Examiners report

[N/A]
b.
[N/A]
c.

Syllabus sections

Option A: Neurobiology and behaviour » Option A: Neurobiology and behaviour (Core topics) » A.2 The human brain
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Option A: Neurobiology and behaviour » Option A: Neurobiology and behaviour (Core topics)
Option A: Neurobiology and behaviour

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