Question 18M.3.SL.TZ1.6
| Date | May 2018 | Marks available | [Maximum mark: 5] | Reference code | 18M.3.SL.TZ1.6 |
| Level | SL | Paper | 3 | Time zone | TZ1 |
| Command term | Compare and contrast, Identify, Outline | Question number | 6 | Adapted from | N/A |
The diagram shows the components of a cochlear implant system.
Identify the part of the ear labelled X.
[1]
semicircular canal(s)
Compare and contrast the mechanisms involved in hearing sounds in individuals with and without cochlear implants.
[2]
Compare:
a. sound transmitted by the auditory nerve in both cases
OR
both change sound waves to electrical impulses
Contrast:
b. without CI cochlea stimulated by vibrations/middle ear bones whereas with CI electrical signals stimulate cochlea
OR
with a CI the auditory nerve is stimulated by electrodes whereas without CI the auditory nerve is stimulated by hair cells
One compare and one contrast must be given.
Outline the role of the ear in balance perception.
[2]
a. head movements cause fluid in the canals to move
b. this deflects hair cells
c. (semicircular canals) are perpendicular/right angles detecting movements in any direction/plane
d. send nerve impulses to the brain (by acoustic nerve)