| Date | November 2017 | Marks available | 1 | Reference code | 17N.1.SL.tz0.8 |
| Level | Standard Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Which | Question number | 8 | Adapted from | N/A |
Question
Which are involved in the regulation of heart rate?
I. Sinoatrial node
II. Autonomic nervous system
III. Adrenaline
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
Markscheme
D
Examiners report
This was the most difficult question on the paper with a good discrimination index. The responses A and B were equally good distractors. The question proved to be more challenging than anticipated.
