CAIE A-Level Biology AS 8.3.4 Cardiac Conduction System Questions
Explain how the cardiac conduction system coordinates heart contraction using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- AS
Exam points
- Explain the cardiac conduction system and how it coordinates heart contraction.
CAIE A-Level Biology AS 8.3.4 Cardiac Conduction System Questions question 1
[Maximum number: 1]
An irregular heartbeat may be the result of ineffective electrical stimulation of the atria.
Which area of the heart could be damaged, causing this irregular heartbeat?
A
atrioventricular node
B
septum
C
Purkyne tissue
D
sinoatrial node
D
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