Date | May 2018 | Marks available | 1 | Reference code | 18M.3.HL.TZ1.6 |
Level | Higher level | Paper | Paper 3 | Time zone | Time zone 1 |
Command term | State | Question number | 6 | Adapted from | N/A |
Question
The table shows the typical sound intensity of different sources.
State the type of sensory receptors that detect sound.
Suggest one reason for hearing loss caused by extended exposure to high intensity sound.
Outline the role of the ear in balance perception.
Markscheme
mechanoreceptor
a. permanent injury/loss of hair cells / sensory hairs in cochlea
b. damage to bones in the middle ear / damage the connections between the ossicles
c. ruptured eardrum
a. (3) semicircular canals are perpendicular/at right angles/help sense movement
b. movement (of head) causes fluid in canals/inner ear to move
c. deflects/bends hair cells
d. (Hair cells) send messages to brain via auditory nerve