DP Chemistry (last assessment 2024)
Question 19M.3.sl.TZ1.a
| Date | May 2019 | Marks available | [Maximum mark: 2] | Reference code | 19M.3.sl.TZ1.a |
| Level | sl | Paper | 3 | Time zone | TZ1 |
| Command term | Explain | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
19M.3.sl.TZ1.a
Opium and its derivatives have been used for thousands of years as strong analgesics.
Explain how opiates act to provide pain relief.
[2]
Markscheme
«temporarily» bond/bind to «opioid» receptors in the brain/CNS [✔]
block the transmission of pain impulses [✔]
Examiners report
Most candidates correctly remembered the mode of action strong analgesics, though some had difficulty expressing it clearly.
