Anatomy Of The Heart Quiz

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Anatomy Of The Heart Quiz - Quiz

These little things in our chests are responsible for our bodies running as smooth as they can from day to day, transporting blood to each and every organ in a matter of a second. What do you know about how it works, however? Find out in this anatomy of the heart quiz.


Questions and Answers
  • 1. 

    The blood vessel that carries blood from the right ventricle to the lungs

    • A.

      Aorta

    • B.

      Pulmonary artery

    • C.

      Precordium

    • D.

      Chordae tendineae

    • E.

      Coronary arteries

    Correct Answer
    B. Pulmonary artery
    Explanation
    The pulmonary artery is the blood vessel that carries blood from the right ventricle to the lungs. It is responsible for transporting deoxygenated blood from the heart to the lungs, where it picks up oxygen and gets rid of carbon dioxide. This oxygenated blood is then returned to the heart to be pumped to the rest of the body. The pulmonary artery is unique in that it is the only artery in the body that carries deoxygenated blood.

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  • 2. 

    The left ventricle ejects blood into this blood vessel

    • A.

      Aorta

    • B.

      Pulmonary artery

    • C.

      Pulmonic valve

    • D.

      Coronary arteries

    • E.

      Pericardium

    Correct Answer
    A. Aorta
    Explanation
    The left ventricle is responsible for pumping oxygenated blood to the rest of the body, and it does so by ejecting blood into the aorta. The aorta is the largest artery in the body and carries oxygen-rich blood away from the heart to supply all the organs and tissues. Therefore, it is the correct answer for the question.

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  • 3. 

    This semilunar valve "sees" unoxygenated blood

    • A.

      Tricuspid

    • B.

      Aorta

    • C.

      Bicuspid

    • D.

      Pulmonic

    • E.

      Precordium

    Correct Answer
    D. Pulmonic
    Explanation
    The correct answer is pulmonic because the pulmonic valve is located between the right ventricle and the pulmonary artery. It is responsible for preventing the backflow of blood from the pulmonary artery into the right ventricle. Since the pulmonary artery carries deoxygenated blood from the heart to the lungs, the pulmonic valve "sees" unoxygenated blood.

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  • 4. 

    The venae cavae empties blood into this cardiac chamber

    • A.

      Right atrium

    • B.

      Left atrium

    • C.

      Pericardium

    • D.

      Myocardium

    • E.

      Pericardial space

    Correct Answer
    A. Right atrium
    Explanation
    The venae cavae are large veins that carry deoxygenated blood from the body back to the heart. They empty this blood into the right atrium, which is one of the four chambers of the heart. The right atrium then contracts and pumps the blood into the right ventricle, which then pumps the blood to the lungs for oxygenation. Therefore, the correct answer is the right atrium.

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  • 5. 

    Actin, myosin, and sarcomeres are terms that describe this contracting layer

    • A.

      Left ventricle

    • B.

      Right ventricle

    • C.

      Myocardium

    • D.

      Pericardium

    • E.

      Precordium

    Correct Answer
    C. Myocardium
    Explanation
    The terms actin, myosin, and sarcomeres are all related to muscle contraction. Actin and myosin are proteins involved in the sliding filament theory of muscle contraction, while sarcomeres are the basic contractile units of muscle fibers. The myocardium is the muscular layer of the heart that contracts to pump blood, making it the most appropriate answer in this context. The other options, such as the left ventricle, right ventricle, pericardium, and precordium, are not specifically related to muscle contraction.

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  • 6. 

    The mitral valve and the aortic valve are associated with this cardiac chamber

    • A.

      Right atrium

    • B.

      Left atrium

    • C.

      Pericardium

    • D.

      Right ventricle

    • E.

      Left ventricle

    Correct Answer
    E. Left ventricle
    Explanation
    The mitral valve and the aortic valve are associated with the left ventricle. The mitral valve is located between the left atrium and the left ventricle, allowing blood to flow from the atrium to the ventricle. The aortic valve is located between the left ventricle and the aorta, allowing blood to be pumped out of the heart and into the rest of the body. Therefore, the left ventricle is the correct answer as it is directly involved in the functioning of these valves.

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  • 7. 

    The pulmonic and tricuspid valves are associated with this structure

    • A.

      Right atrium

    • B.

      Left atrium

    • C.

      Pericardium

    • D.

      Right ventricle

    • E.

      Left ventricle

    Correct Answer
    D. Right ventricle
    Explanation
    The pulmonic and tricuspid valves are associated with the right ventricle. The right ventricle is one of the four chambers of the heart and is responsible for pumping oxygen-depleted blood to the lungs for oxygenation. The pulmonic valve is located between the right ventricle and the pulmonary artery, while the tricuspid valve is located between the right atrium and the right ventricle. These valves ensure that blood flows in the correct direction and prevents backflow.

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  • 8. 

    Area of the anterior chest wall overlying the heart and great vessels

    • A.

      Chordae tendineae

    • B.

      Pericardium

    • C.

      Pericardial space

    • D.

      Precordium

    • E.

      Myocardium

    Correct Answer
    D. Precordium
    Explanation
    The precordium refers to the area of the chest wall that overlies the heart and great vessels. It is the region where the heart can be palpated and auscultated. This area includes the sternum, ribs, and intercostal spaces. The term "precordium" is often used to describe the location where cardiac examination is performed and where heart sounds are heard.

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  • 9. 

    These blood vessels arise at the base of the aorta just beyond the aortic valve

    • A.

      Coronary arteries

    • B.

      Pulmonary artery

    • C.

      Chordae tendineae

    • D.

      Myocardium

    • E.

      Bicuspid valve

    Correct Answer
    A. Coronary arteries
    Explanation
    The coronary arteries are the blood vessels that arise at the base of the aorta just beyond the aortic valve. These arteries supply oxygenated blood to the heart muscle, known as the myocardium. Without the coronary arteries, the heart would not receive the necessary oxygen and nutrients to function properly. Therefore, the coronary arteries are crucial for maintaining a healthy heart.

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  • 10. 

    Attach the cusps of the AV valves to the ventricular walls

    • A.

      Coronary arteries

    • B.

      Pericardium

    • C.

      Myocardium

    • D.

      Precordium

    • E.

      Chordae tendineae

    Correct Answer
    E. Chordae tendineae
    Explanation
    The chordae tendineae are fibrous cords that attach the cusps of the AV valves (mitral and tricuspid valves) to the ventricular walls. These cords prevent the valves from inverting or bulging into the atria during ventricular contraction. They help to maintain the proper closure of the valves and ensure the unidirectional flow of blood through the heart. The other options listed (coronary arteries, pericardium, myocardium, and precordium) are not directly involved in attaching the cusps of the AV valves to the ventricular walls.

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  • 11. 

    A cavity located between the epicardium and the parietal pericardium

    • A.

      Precordium

    • B.

      Pericardium

    • C.

      Pericardial space

    • D.

      Precordium

    • E.

      Aorta

    Correct Answer
    C. Pericardial space
    Explanation
    The pericardial space is a cavity located between the epicardium (outer layer of the heart) and the parietal pericardium (outer layer of the pericardium). It contains a small amount of fluid that helps lubricate the movement of the heart. This space allows the heart to move and beat without friction against the surrounding structures.

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  • 12. 

    Which of the following is least true of the myocardium?

    • A.

      Contains actin and myosin

    • B.

      Is the heart muscle

    • C.

      Is found in the ventricles but not the atria

    • D.

      Pumps the blood

    • E.

      None of these

    Correct Answer
    C. Is found in the ventricles but not the atria
    Explanation
    The myocardium is the heart muscle, and it is found in both the ventricles and the atria. Therefore, the statement "is found in the ventricles but not the atria" is least true of the myocardium.

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  • 13. 

    During ventricular contraction, the AV valves close in order to

    • A.

      Speed up the action potential as it moves through the conduction sysem

    • B.

      Prevent the backflow of blood from the ventricles to the atria

    • C.

      Enhance drainage of the coronary veins

    • D.

      Push blood into the venae cavae

    Correct Answer
    B. Prevent the backflow of blood from the ventricles to the atria
    Explanation
    During ventricular contraction, the AV valves close in order to prevent the backflow of blood from the ventricles to the atria. This is important because the AV valves separate the atria from the ventricles, and their closure ensures that blood flows in the correct direction, from the atria to the ventricles and then out to the rest of the body. If the AV valves did not close during ventricular contraction, blood could flow back into the atria, reducing the efficiency of the heart's pumping action and potentially causing congestion in the atria.

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  • 14. 

    Which of the following is least related to "lubb" (of the lubb-dupp duo)?

    • A.

      Called S1

    • B.

      Due to the closure of the AV valves

    • C.

      Occurs at the beginning of ventricular contraction

    • D.

      Caused by the firing of the SA node

    • E.

      All of the above

    Correct Answer
    D. Caused by the firing of the SA node
    Explanation
    The firing of the SA node refers to the initiation of the electrical signal that starts the cardiac cycle, while "lubb" (the first heart sound) is caused by the closure of the AV valves. These two events are not directly related to each other, making "caused by the firing of the SA node" the least related option.

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  • 15. 

    S2 is

    • A.

      Due to the closure of the semilunar valves at the beginning of ventricular relaxation

    • B.

      Lubb

    • C.

      The heart sound caused the contraction of the ventricular myocardium

    • D.

      Caused by the firing of the SA node

    • E.

      None of the above

    Correct Answer
    A. Due to the closure of the semilunar valves at the beginning of ventricular relaxation
    Explanation
    S2 is the second heart sound, commonly referred to as "lubb." It occurs due to the closure of the semilunar valves (pulmonary and aortic valves) at the beginning of ventricular relaxation. This closure creates a sound that can be heard during cardiac auscultation. The other options mentioned, such as the contraction of the ventricular myocardium or the firing of the SA node, are not directly related to the generation of the S2 sound.

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  • 16. 

    The purpose of the right heart is to pump blood

    • A.

      To the systemic circulation

    • B.

      Into the aorta

    • C.

      To the lungs for oxygenation

    • D.

      To the venae cavae

    • E.

      None of these

    Correct Answer
    C. To the lungs for oxygenation
    Explanation
    The purpose of the right heart is to pump blood to the lungs for oxygenation.

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  • 17. 

    In which structure does blood change from blue to red?

    • A.

      Venae cavae

    • B.

      Pulmonary artery

    • C.

      Aorta

    • D.

      Pulmonary capillary

    • E.

      None of the above

    Correct Answer
    D. Pulmonary capillary
    Explanation
    Blood changes from blue to red in the pulmonary capillary. This is because the pulmonary capillary is the site where oxygen is taken up by the red blood cells and carbon dioxide is released. Oxygenated blood appears red, while deoxygenated blood appears blue. Therefore, as the blood passes through the pulmonary capillary and picks up oxygen, it changes from blue to red.

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  • 18. 

    Which of the following spaces does not contain the heart?

    • A.

      Thoracic cavity

    • B.

      Ventral cavity

    • C.

      Pleural cavity

    • D.

      Mediastinum

    • E.

      None of the above

    Correct Answer
    C. Pleural cavity
    Explanation
    The pleural cavity is the space between the two layers of the pleura, which is a membrane that surrounds the lungs. It does not contain the heart. The thoracic cavity contains the heart, lungs, and other organs. The ventral cavity is a larger cavity that includes the thoracic and abdominal cavities. The mediastinum is a subdivision of the thoracic cavity and it contains the heart, among other structures. Therefore, the correct answer is pleural cavity.

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  • 19. 

    A cell that spontaneously depolarizes from resting membrane potential to threshold potential is

    • A.

      Called a pacemaker cell

    • B.

      Referred to as being ectopic

    • C.

      A stem cell

    • D.

      Found only in heart valves

    • E.

      None of the above

    Correct Answer
    A. Called a pacemaker cell
    Explanation
    A cell that spontaneously depolarizes from resting membrane potential to threshold potential is called a pacemaker cell. Pacemaker cells are specialized cells found in various tissues, including the heart, that generate electrical impulses to initiate the contraction of muscles. These cells have the ability to depolarize on their own, setting the rhythm for the entire organ. It is important to note that pacemaker cells are not limited to the heart and can also be found in other tissues throughout the body.

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  • 20. 

    Stenosis of this valve causes left ventricular hypertrophy.

    • A.

      Mitral

    • B.

      Tricuspid

    • C.

      Pulmonic

    • D.

      Aortic

    • E.

      None of the above

    Correct Answer
    D. Aortic
    Explanation
    Stenosis of the aortic valve refers to the narrowing of the valve opening, which obstructs the flow of blood from the left ventricle to the aorta. As a result, the left ventricle has to work harder to pump blood through the narrowed valve, leading to increased pressure and causing left ventricular hypertrophy. This condition is characterized by the thickening and enlargement of the left ventricular muscle. Therefore, the correct answer is aortic.

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  • 21. 

    Stenosis of this valve causes left ventricular hypertrophy?

    • A.

      Mitral

    • B.

      Tricuspid

    • C.

      Pulmonic

    • D.

      Aortic

    • E.

      None of these

    Correct Answer
    D. Aortic
    Explanation
    Stenosis of the aortic valve causes left ventricular hypertrophy because the narrowing of the valve obstructs blood flow from the left ventricle to the aorta. This obstruction increases pressure in the left ventricle, leading to the heart muscle thickening and enlarging to compensate for the increased workload.

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  • 22. 

    Which of the following is true of coronary blood flow?

    • A.

      In a healthy heart, coronary blood flow can increase

    • B.

      Atherosclerotic coronary blood vessels are usually maximally dilated at rest

    • C.

      A decrease in coronary blood flow causes pain (called angina)

    • D.

      All of the above are true

    • E.

      All of the above are false

    Correct Answer
    D. All of the above are true
    Explanation
    In a healthy heart, coronary blood flow can increase, which is necessary to meet the increased oxygen demands during physical activity. Atherosclerotic coronary blood vessels are usually maximally dilated at rest, as the narrowed arteries cannot dilate further to increase blood flow. A decrease in coronary blood flow causes pain, known as angina, as the heart muscle does not receive enough oxygen. Therefore, all of the statements mentioned in the options are true.

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  • 23. 

    Which of the following is not true about the left ventricle?

    • A.

      Pumps blood into the aorta

    • B.

      Receives blood from the left atrium

    • C.

      Contains oxygenated blood

    • D.

      The oxygen from blood within the left ventricle diffuses across the endocardium into the left ventricular myocardium

    Correct Answer
    D. The oxygen from blood within the left ventricle diffuses across the endocardium into the left ventricular myocardium
    Explanation
    The left ventricle is responsible for pumping oxygenated blood into the aorta, not receiving blood from the left atrium. The left atrium is the chamber that receives oxygenated blood from the lungs. The left ventricle contains oxygenated blood, as it receives blood from the left atrium. However, the oxygen from the blood within the left ventricle does not diffuse across the endocardium into the left ventricular myocardium. The myocardium is already supplied with oxygenated blood through the coronary arteries.

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  • 24. 

    An enlarged myocardium (ventricular hpertrophy) indicates

    • A.

      That the heart must work harder than normal

    • B.

      That there is inadequate coronary blood flow

    • C.

      A stenotic mitral valve

    • D.

      Chronic anemia

    Correct Answer
    A. That the heart must work harder than normal
    Explanation
    An enlarged myocardium (ventricular hypertrophy) indicates that the heart must work harder than normal. Ventricular hypertrophy occurs as a result of increased workload on the heart, such as in conditions like hypertension or heart valve disorders. The heart muscle thickens in response to the increased demand, allowing the heart to pump blood effectively. This adaptation helps to compensate for the increased workload and maintain cardiac output.

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  • 25. 

    The action potential (cardiac impulse) has two phases

    • A.

      Systole and diastole

    • B.

      Filling and ejecting

    • C.

      Depolarization and repolarization

    • D.

      P wave and T wave

    Correct Answer
    C. Depolarization and repolarization
    Explanation
    The action potential in the heart consists of two phases: depolarization and repolarization. During depolarization, the electrical charge of the cardiac cells becomes more positive, leading to the contraction of the heart muscle. Repolarization, on the other hand, is the process of restoring the electrical charge of the cells back to their resting state, allowing the heart to relax and prepare for the next contraction. These two phases are crucial for the proper functioning of the heart and the coordination of its contractions.

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