DP Biology (last assessment 2024)

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Question 19N.3.SL.TZ0.7

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Date November 2019 Marks available [Maximum mark: 4] Reference code 19N.3.SL.TZ0.7
Level SL Paper 3 Time zone TZ0
Command term Describe Question number 7 Adapted from N/A
7.
[Maximum mark: 4]
19N.3.SL.TZ0.7

Describe how the inner ear detects audible sounds.

[4]

Markscheme

a. vibrations transmitted by the oval window «to the inner ear» ✔

b. sound waves cause vibrations/waves in cochlear fluid ✔

c. sensory hairs ‹attached to the basement membrane› are moved by the waves in the fluid ✔

d. each frequency stimulates a specific groups of hair cells ✔

e. higher frequencies detected closer to the base of the cochlea
OR
vice versa ✔

f. impulses transmitted by the auditory nerve to the brain ✔

Syllabus sections