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.
Using the letter A, label where sound is amplified.
Explain the function of the cochlea in hearing.
Outline how the hearing of a deaf or partially deaf person could be improved.
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
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. 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]
hearing aid/cochlear implant
Answer must refer to ear, not for example just “operation”
Accept other valid answers