DP Biology (last assessment 2024)
Question 23M.1.SL.TZ2.27
| Date | May 2023 | Marks available | [Maximum mark: 1] | Reference code | 23M.1.SL.TZ2.27 |
| Level | SL | Paper | 1 | Time zone | TZ2 |
| Command term | Question number | 27 | Adapted from | N/A |
27.
[Maximum mark: 1]
23M.1.SL.TZ2.27
The diagram shows the pressure changes in the left atrium, left ventricle and aorta during part of the cardiac cycle.
Are the valves between the atria and the ventricles open or closed at time X and time Y?
| Time X | Time Y | |
| A. | open | open |
| B. | open | closed |
| C. | closed | open |
| D . | closed | closed |
[1]
Markscheme
B