| Date | November 2015 | Marks available | 1 | Reference code | 15N.1.HL.TZ0.21 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 21 | Adapted from | N/A |
Question
What causes heart ventricles to fill with blood?
I. Atrial contraction
II. Closing of atrio-ventricular valves
III. Opening of semilunar valves
A. I only
B. I and II only
C. II and III only
D. III only
Markscheme
A
Examiners report
[N/A]
Syllabus sections
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