| Date | May 2017 | Marks available | 1 | Reference code | 17M.3.hl.TZ2.22 |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | Outline | Question number | 22 | Adapted from | N/A |
Question
A number of drugs have been developed to treat excess acidity in the stomach.
Outline how ranitidine (Zantac) functions to reduce stomach acidity.
Markscheme
Blocks/binds H2-histamine receptors «in cells of stomach lining»
OR
prevents histamine molecules binding to H2-histamine receptors «and triggering acid secretion»
Accept “H2 receptor antagonist”
[1 mark]
Examiners report
[N/A]
