DP Biology (last assessment 2024)

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Question 18M.3.HL.TZ2.5d

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.3.HL.TZ2.5d
Level HL Paper 3 Time zone TZ2
Command term Deduce Question number d Adapted from N/A
d.
[Maximum mark: 2]
18M.3.HL.TZ2.5d
(d)

The images show the differences in glucose uptake between the brain of a person without Alzheimer’s disease (image I) and the brain of a patient with Alzheimer’s disease (image II). The key indicates the levels of glucose uptake.

Deduce the implications of reduced glucose uptake in the brain of a patient with Alzheimer’s disease.

[2]

Markscheme

a. brain metabolism requires large energy inputs
OR
glucose is the only source of energy of the brain 

b. «less glucose» means there is less respiration/metabolic reactions 

c. less cognitive/functional/synaptic activity 

d. some cell death

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