ECG: What Do You Know About Cardiac Cycle? Trivia Quiz

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| By Noriantie Binti
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Noriantie Binti
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  • 1/10 Questions

    QRS-complex occurs during which phase?

    • Atrial depolarization
    • Ventricular depolarization
    • Atrial repolarization
    • Ventrial repolarization
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About This Quiz

ECG: what do you know about the cardiac cycle? The heart is one of the most important organs in the human body, and it makes at least seventy beats per minute, which ensures blood is pumped to all vital organs. By taking this quiz, you will be testing your knowledge of what happens from one beat until the next one is achieved. Give it a try!

ECG: What Do You Know About Cardiac Cycle? Trivia Quiz - Quiz

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  • 2. 

    The atria never need to contract due to passive ventricular filling.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement is false because the atria do need to contract in order to facilitate ventricular filling. During the cardiac cycle, the atria contract to push blood into the ventricles, which is known as atrial systole. This contraction helps to complete the filling of the ventricles before they contract (ventricular systole) to pump blood out of the heart. Therefore, the atria play an active role in the filling of the ventricles and their contraction is necessary for proper cardiac function.

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  • 3. 

     Which of the following supplies the right side of the heart with blood?

    • The pulmonary veins

    • The pulmonary arteries

    • The superior and inferior vena cava

    • The aorta

    Correct Answer
    A. The superior and inferior vena cava
    Explanation
    The superior and inferior vena cava supply the right side of the heart with blood. The vena cavae are large veins that carry deoxygenated blood from the body back to the heart. The superior vena cava collects blood from the upper body, including the head, neck, and upper extremities, while the inferior vena cava collects blood from the lower body, including the abdomen, pelvis, and lower extremities. This deoxygenated blood is then pumped into the right atrium of the heart, where it is then sent to the right ventricle and eventually to the lungs for oxygenation.

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  • 4. 

    The highest rate of increased pressure happens in 

    • Right ventricle

    • Right atrium

    • Left ventricle

    • Left atrium

    Correct Answer
    A. Left ventricle
    Explanation
    The left ventricle is responsible for pumping oxygenated blood to the rest of the body, so it experiences the highest rate of increased pressure during systole when it contracts to push blood out into the aorta. This is because the left ventricle has thicker and more muscular walls compared to the right ventricle, allowing it to generate greater force and pressure. The right ventricle, on the other hand, pumps blood to the lungs, which have lower resistance and pressure, resulting in a lower rate of pressure increase. The atria, both right and left, primarily receive blood and do not generate as much pressure as the ventricles.

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  • 5. 

    The beginning of ventricular systole is when blood flowing back toward the relaxed ventricles causes the semilunar valves to close.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The beginning of ventricular systole is actually when the ventricles contract, causing the semilunar valves to open and blood to be pumped out of the heart. The closing of the semilunar valves occurs at the end of ventricular systole, when the ventricles relax and blood begins to flow back toward them. Therefore, the statement is false.

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  • 6. 

    When the pressure in the ventricles becomes lower than the pressure in the atria…

    • The ventricles contract.

    • Blood flows into the pulmonary trunk.

    • Blood flows into the aorta.

    • The atrioventricular valves open.

    Correct Answer
    A. The atrioventricular valves open.
    Explanation
    When the pressure in the ventricles becomes lower than the pressure in the atria, it indicates that the ventricles are in the diastole phase of the cardiac cycle. During this phase, the atrioventricular valves open, allowing blood to flow from the atria into the ventricles. This is necessary for the ventricles to fill with blood before they contract during the systole phase. Therefore, the correct answer is that the atrioventricular valves open.

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  • 7. 

    What happen during QRS complex in electrocardiogram

    • Ventricular systole

    • Ventricular diastole

    • Atria systole

    • Atria diastole

    Correct Answer
    A. Ventricular systole
    Explanation
    During the QRS complex in an electrocardiogram, the ventricles of the heart contract, which is known as ventricular systole. This contraction allows the ventricles to pump blood out of the heart and into the arteries. The QRS complex represents the depolarization of the ventricles, which leads to their contraction. This is an important phase of the cardiac cycle as it ensures that oxygenated blood is efficiently pumped to the rest of the body.

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  • 8. 

    During ventricular systole

    • Blood flows from the ventricles to the pulmonary arteries

    • The ventricles relax

    • The atrium contract

    • The tricuspid and mitral valves are opened

    Correct Answer
    A. Blood flows from the ventricles to the pulmonary arteries
    Explanation
    During ventricular systole, the ventricles contract, causing the tricuspid and mitral valves to close. This prevents blood from flowing back into the atria. At the same time, the pulmonary and aortic valves open, allowing blood to be pumped out of the ventricles. In this case, blood flows from the ventricles to the pulmonary arteries, which carry deoxygenated blood to the lungs for oxygenation.

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  • 9. 

    The heart sound ‘dup’ because

    • The flow of blood into the heart

    • The flow of blood from the atrium into the ventricles

    • The closure of the atrioventricular valves

    • Recoil of the blood against closure of the semilunar valves

    Correct Answer
    A. Recoil of the blood against closure of the semilunar valves
    Explanation
    The correct answer is "recoil of the blood against closure of the semilunar valves." When the semilunar valves close, the blood flowing back towards the heart experiences resistance and creates a recoil effect. This recoil causes a sound known as "dup." The other options listed do not directly relate to the sound produced by the closure of the semilunar valves.

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  • 10. 

    Which of the following events in a normal cardiac cycle takes the shortest time?

    • Atrial systole, ventricle diastole

    • Atrial and ventricle diastole

    • Atrial and ventricle systole

    • Atrial diastole, ventricle systole

    Correct Answer
    A. Atrial systole, ventricle diastole
    Explanation
    During a normal cardiac cycle, the atria contract during atrial systole, while the ventricles relax during ventricular diastole. Atrial systole is the contraction of the atria, which pushes blood into the ventricles. Ventricle diastole is the relaxation of the ventricles, allowing them to fill with blood. Atrial systole takes a shorter time compared to ventricle diastole because the atria have a smaller volume to contract and push blood into the ventricles, while the ventricles have a larger volume to relax and fill with blood. Therefore, atrial systole takes the shortest time.

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Quiz Review Timeline (Updated): Mar 22, 2023 +

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Feb 06, 2020
    Quiz Created by
    Noriantie Binti

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