DP Biology (last assessment 2024)
Question 19M.3.HL.TZ1.a.i
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.HL.TZ1.a.i |
| Level | HL | Paper | 3 | Time zone | TZ1 |
| Command term | State | Question number | a.i | Adapted from | N/A |
a.i.
[Maximum mark: 1]
19M.3.HL.TZ1.a.i
The X-ray shows the thorax of a patient who has had an artificial pacemaker fitted.
[Source: M S Silvetti and F Drago, Twenty years of paediatric cardiac pacing: 515 pacemakers and 480 leads implanted in 292
patients, Europace, 2006, 8, 7, 530–536, by permission of Oxford University Press]
State one condition which would require the use of an artificial pacemaker.
[1]
Markscheme
a. heartbeat too slow/fast/irregular/tachycardia/fibrillations ✔
b. sinoatrial node is malfunctioning ✔
c. pathway that conducts electrical impulses generated by the sinoatrial node is impaired ✔
Do not accept heart attack
Examiners report
This was generally well answered, with a few students identifying generic (and incorrect) medical problems such as heart attacks and hypertension.
