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Date November 2017 Marks available 1 Reference code 17N.3.SL.TZ0.06
Level Standard level Paper Paper 3 Time zone TZ0 / no time zone
Command term Outline Question number 06 Adapted from N/A

Question

The image shows a human ear.

[Source: Leonello/iStock]

Using the letter M, label the structures which detect movement of the head.

[1]
a.i.

Using the letter A, label where sound is amplified.

[1]
a.ii.

Explain the function of the cochlea in hearing.

[2]
b.

Outline how the hearing of a deaf or partially deaf person could be improved.

[1]
c.

Markscheme

Example of answer for part (a)(i)

The candidate should label the semicircular canals

Line with the letter M is expected but accept the letter M on diagram if clearly indicating the correct structure

a.i.

Example of answer for part (a)(ii)

The candidate should label the bones/ossicles in middle ear

Line with the letter A is expected but accept the letter A on diagram if clearly indicating the correct location

a.ii.

a. sound «waves» enters the ear causing fluid in the cochlea to move/vibrate

b. «movement of fluid in cochlea» causes the hair cells to move

c. «details of hair cell movement» is transmitted to brain via the auditory nerve

[Max 2 Marks]

b.

hearing aid/cochlear implant

Answer must refer to ear, not for example just “operation”

Accept other valid answers

c.

Examiners report

[N/A]
a.i.
[N/A]
a.ii.
[N/A]
b.
[N/A]
c.

Syllabus sections

Option A: Neurobiology and behaviour » Option A: Neurobiology and behaviour (Core topics) » A.3 Perception of stimuli
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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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