Class 11 Biology · Chapter 11 · Test 2
Cardiac Cycle and Circulation
64 MCQs. This part covers the cardiac cycle, heart sounds, murmurs, the SA node, AV node and Purkinje fibres, and the ECG. It also covers the structure of arteries, capillaries and veins, precapillary sphincters, vasoconstriction, vasodilation, the rate of blood flow and the circulatory pathways, along with the related exercise MCQs.
64 questions · 45 min · 64 marks
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Sample questions
The first 5 of 64. Try each one, then tap to see the answer.
Question 1
Alternating relaxations and contractions of the heart are collectively called a:
- ACardiac cycle
- BPulse
- CMurmur
- DReflex
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Answer: A
They are collectively called a cardiac cycle or one heartbeat.
Question 2
The relaxed period of heart chambers is called:
- ADiastole
- BSystole
- CMurmur
- DPulse
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Answer: A
The relaxed period is diastole.
Question 3
Atrial systole passes blood through the AV valves into the:
- ARelaxed ventricles
- BAorta
- CPulmonary trunk
- DVena cava
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Answer: A
Atrial systole pushes blood into the two relaxed ventricles.
Question 4
During ventricular systole the pulmonary and aortic valves:
- AOpen
- BClose
- CRupture
- DDo not move
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Answer: A
During ventricular systole AV valves close and semilunar valves open.
Question 5
In one heartbeat diastole lasts about:
- A0.4 sec
- B0.1 sec
- C0.3 sec
- D1 sec
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Answer: A
Diastole lasts 0.4 sec.
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