DP Biology (last assessment 2024)
Question 18M.3.HL.TZ1.6
| Date | May 2018 | Marks available | [Maximum mark: 4] | Reference code | 18M.3.HL.TZ1.6 |
| Level | HL | Paper | 3 | Time zone | TZ1 |
| Command term | Outline, State, Suggest | Question number | 6 | Adapted from | N/A |
6.
[Maximum mark: 4]
18M.3.HL.TZ1.6
The table shows the typical sound intensity of different sources.
(a.i)
State the type of sensory receptors that detect sound.
[1]
Markscheme
mechanoreceptor
(a.ii)
Suggest one reason for hearing loss caused by extended exposure to high intensity sound.
[1]
Markscheme
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
(b)
Outline the role of the ear in balance perception.
[2]
Markscheme
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