| Date | May 2016 | Marks available | 1 | Reference code | 16M.1.SL.tz0.10 |
| Level | Standard Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Which | Question number | 10 | Adapted from | N/A |
Question
Which of the following correctly describes the sequence of excitation of heart muscle?
A. AV node → bundle of HIS → SA node
B. SA node → AV node → bundle of HIS
C. bundle of HIS → SA node → AV node
D. AV node → SA node → bundle of HIS
Markscheme
B
Examiners report
A mid-difficulty question, with A and D almost equal main distractors. There were 3 blank responses for this question.
