DP Chemistry (last assessment 2024)
Question 19M.3.sl.TZ2.14b(i)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.sl.TZ2.14b(i) |
| Level | sl | Paper | 3 | Time zone | TZ2 |
| Command term | State | Question number | b(i) | Adapted from | N/A |
b(i).
[Maximum mark: 1]
19M.3.sl.TZ2.14b(i)
Medicines and drugs are tested for effectiveness and safety.
(b(i))
State one advantage of using morphine as an analgesic.
[1]
Markscheme
blocks pain impulses/binds with «opioid» receptors in brain/CNS
OR
effective against strong pain
OR
sedate patients to reduce trauma [✔]
Note: Accept “effective against pain after surgery/cancer/following serious injury”.
Accept “relieves anxiety/stress associated with severe/terminal illness”.
Examiners report
This was not a particularly well answered question even though it has been seen in previous exams. Many students confused it with the idea of solubility and passing through the blood brain barrier which was 1(b) (ii).
