DP Biology (last assessment 2024)
Question 18M.3.SL.TZ2.5
| Date | May 2018 | Marks available | [Maximum mark: 6] | Reference code | 18M.3.SL.TZ2.5 |
| Level | SL | Paper | 3 | Time zone | TZ2 |
| Command term | Explain, Label, State | Question number | 5 | Adapted from | N/A |
5.
[Maximum mark: 6]
18M.3.SL.TZ2.5
(a)
Label the pupil and the retina on the diagram.
[Source: Holly Fischer https://en.wikipedia.org/wiki/Human_eye#/media/File:Three_Internal_chambers_of_the_Eye.png]
[2]
Markscheme
retina
pupil
e.g:
[Source: Holly Fischer https://en.wikipedia.org/wiki/Human_eye#/media/File:Three_Internal_chambers_of_the_Eye.png]
Examiners report
(b)
Explain the use of the pupil reflex as a test for brain damage.
[3]
Markscheme
a. «bright» light is shone in to the eye
b. the pupil reflex is when the pupils constrict
c. if not observed could indicate damage to the optic nerve/ocular motor nerve/medulla oblongata
OR
brain stem death
OR
depressant drug use
Examiners report
(c)
State the property of the nervous system that allows it to change with experience and allows the brain to recover from a stroke.
[1]
Markscheme
plasticity
Examiners report