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Date May 2018 Marks available 3 Reference code 18M.3.SL.TZ1.4
Level Standard level Paper Paper 3 Time zone Time zone 1
Command term Compare and contrast Question number 4 Adapted from N/A

Question

The image shows a normal human brain in vertical section.

Identify the parts of the brain labelled X and Y.

 

[2]
a.

Outline the function of the nucleus accumbens.

[1]
b.

Compare and contrast the sensory and motor functions of the left and right cerebral hemispheres of the brain.

[3]
c.

Markscheme

X = cerebellum 

Y = pituitary gland

a.

perception of pleasure / control of depression / reward centre / secretes dopamine

b.

Compare:

a. both parts control higher order functions / example of higher order function 

b. each side controls muscle contraction on other side of body / example 

c. each side receives sensory input from sense organs from other side of body / example 

Contrast:

d. right CH controls muscles on left side but left CH controls right side 

e. right CH receives sensory input from left side of body but left CH receives from right side 

f. Broca’s / Wernicke’s / speech processing in left CH only 

g. left CH receives sensory input from RHS of visual field in both eyes but vice versa for right CH

At least one compare and one contrast needed for 3 marks.

c.

Examiners report

[N/A]
a.
[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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