| Date | November 2019 | Marks available | 1 | Reference code | 19N.1.SL.tz0.6 |
| Level | Standard Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | What | Question number | 6 | Adapted from | N/A |
Question
What describes the sequence of excitation of the heart muscle?
A. Sinoatrial node → atrioventricular node → ventricles
B. Atrioventricular node → ventricles → sinoatrial node
C. Ventricles → atrioventricular node → sinoatrial node
D. Sinoatrial node → ventricles → atrioventricular node
Markscheme
A
Examiners report
[N/A]
