IB Biology HL 3.2.16 Cardiac Cycle Question Bank
Practise IB Biology HL 3.2.16 by analysing pressure traces, electrical conduction, valve timing and events across the cardiac cycle.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Interpret pressure traces to calculate timing and identify valve events across the cardiac cycle.
- Explain SA/AV node conduction, delays, heart sounds and coordinated chamber contraction.
B3.2.16 (HL)—Cardiac cycle stages question 1
[Maximum number: 4]
Many biological processes are cyclical. Examples of cycles can be found the level of the cell, the organism and the ecosystem.
Outline the role of the right atrium in the cardiac cycle.
a. right atrium collects (deoxygenated) blood from the body;
b. blood drains into atrium through/from the vena cava;
c. deoxygenated blood present in vena cava/right atrium/right ventricle;
d. right atrium pumps blood into the right ventricle;
e. during atrial systole/ventricular diastole/at the start of the cardiac cycle;
f. sinoatrial node is in the right atrium/sinoatrial node acts as the (natural) pacemaker / sinoatrial node initiates the heartbeat;
g. SA node sends out electrical signal to stimulate contraction in the (walls of the) atria/then propagated to the AV node / (walls of the) ventricles;
4 max
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