Biology Exam - Some Basic Knowledge And Facts About The Heart

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Biology Exam - Some Basic Knowledge And Facts About The Heart - Quiz

The heart is a muscular organ about the size of a fist, located just behind and slightly left of the breastbone. The heart pumps blood through the network of arteries and veins called the cardiovascular system.
This is a biology test, with some basic knowledge and facts about the heart!


Questions and Answers
  • 1. 

    What are the 4 chambers in the heart?

    • A.

      R and L atrium

    • B.

      R and L ventricle

    • C.

      A and b

    • D.

      Option 4

    Correct Answer
    C. A and b
    Explanation
    The correct answer is R and L atrium and R and L ventricle. The heart is divided into four chambers, with two atria (right and left) and two ventricles (right and left). The atria receive blood from the body and lungs, while the ventricles pump blood out to the body and lungs.

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  • 2. 

    What does the red mean in the cardiovascular system?

    • A.

      Oxygenated blood

    • B.

      Deoxygenated blood

    • C.

      Nothing

    • D.

      Option 4

    Correct Answer
    A. Oxygenated blood
    Explanation
    The color red in the cardiovascular system represents oxygenated blood. Oxygenated blood is rich in oxygen and is typically bright red in color. It is pumped from the lungs to the rest of the body to supply oxygen to the tissues and organs.

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  • 3. 

    Is the left side of the heart oxygenated or deoxygenated?

    • A.

      Deoxygenated blood

    • B.

      Oxygenated blood

    • C.

      None

    • D.

      Option 4

    Correct Answer
    B. Oxygenated blood
    Explanation
    The left side of the heart is responsible for pumping oxygenated blood to the rest of the body. Oxygenated blood is rich in oxygen and is necessary for providing oxygen to the body's tissues and organs. This is why the correct answer is "oxygenated blood."

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  • 4. 

    How do arteries travel?

    • A.

      To the heart

    • B.

      Away from the heart

    • C.

      To the bones

    • D.

      Option 4

    Correct Answer
    B. Away from the heart
    Explanation
    Arteries are blood vessels that carry oxygenated blood away from the heart to various parts of the body, including organs, tissues, and muscles. The walls of arteries are thick and elastic, allowing them to withstand the high pressure created by the pumping action of the heart. As the heart contracts, it pushes blood into the arteries, and the arteries carry this oxygen-rich blood to the rest of the body. Therefore, the correct answer is "away from the heart."

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  • 5. 

    What do you call a vessel that goes toward the heart?

    • A.

      Artery

    • B.

      Vein

    • C.

      Capillary

    • D.

      Option 4

    Correct Answer
    B. Vein
    Explanation
    A vessel that goes toward the heart is called a vein. Veins are blood vessels that carry deoxygenated blood back to the heart. They have valves that help prevent the backflow of blood and assist in the movement of blood against gravity. Arteries, on the other hand, carry oxygenated blood away from the heart, while capillaries are tiny blood vessels that connect arteries and veins, allowing for the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues.

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  • 6. 

    Where does the heart sit

    • A.

      In the middle of the chest

    • B.

      On the left side

    • C.

      On the right side

    • D.

      Option 4

    Correct Answer
    A. In the middle of the chest
    Explanation
    The heart sits in the middle of the chest because it is located between the two lungs, slightly to the left of the center of the chest. It is positioned in such a way that it can efficiently pump blood to the entire body.

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  • 7. 

    What sits behind the diaphragm and behind the sternum

    • A.

      Lungs

    • B.

      Esophagus

    • C.

      Heart

    • D.

      Option 4

    Correct Answer
    C. Heart
    Explanation
    The correct answer is the heart. The heart is located behind the diaphragm and behind the sternum.

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  • 8. 

    How many layers does the pericardium have

    • A.

      2

    • B.

      3

    • C.

      1

    • D.

      Option 4

    Correct Answer
    A. 2
    Explanation
    The pericardium, which is the protective sac around the heart, consists of two layers: the fibrous pericardium and the serous pericardium. The fibrous pericardium is the tough, outer layer, while the serous pericardium is the thinner, inner layer. These two layers work together to provide support, protection, and lubrication for the heart. Therefore, the correct answer is 2.

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  • 9. 

    What are the 2 layers of the pericardium?

    • A.

      B and c

    • B.

      Internal layer: visceral layer of serous membrane

    • C.

      External layer: parietal layer of serous pericardium

    • D.

      Option 4

    Correct Answer
    A. B and c
    Explanation
    The pericardium is composed of two layers: the visceral layer of serous membrane, which is the internal layer, and the parietal layer of serous pericardium, which is the external layer. These two layers work together to protect and support the heart.

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  • 10. 

    How many layers does the heart wall have?

    • A.

      3

    • B.

      2

    • C.

      1

    • D.

      Option 4

    Correct Answer
    A. 3
    Explanation
    The heart wall is composed of three layers: the epicardium, the myocardium, and the endocardium. The epicardium is the outermost layer, providing protection and lubrication for the heart. The myocardium is the middle layer, consisting of cardiac muscle tissue responsible for the contraction of the heart. The endocardium is the innermost layer, lining the chambers and valves of the heart. Therefore, the correct answer is 3.

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  • 11. 

    What is the 1st layer of the heart wall?

    • A.

      Myocardium (heart muscle)

    • B.

      Endocardium (lining of cavities 

    • C.

      Epicardium (same as visceral layer)

    • D.

      Option 4

    Correct Answer
    C. Epicardium (same as visceral layer)
    Explanation
    The correct answer is epicardium (same as visceral layer). The epicardium is the outermost layer of the heart wall and is also known as the visceral layer. It is a thin layer that covers the heart and is composed of connective tissue and epithelial cells. The epicardium helps protect the heart and provides a smooth surface for the heart to beat against.

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  • 12. 

    What is the 2nd layer of the heart wall? 

    • A.

      Endocardium (lining of cavities 

    • B.

      Myocardium (heart muscle)

    • C.

      Epicardium (same as visceral layer)

    • D.

      Option 4

    Correct Answer
    B. Myocardium (heart muscle)
    Explanation
    The correct answer is myocardium (heart muscle). The heart wall is composed of three layers: the endocardium, myocardium, and epicardium. The myocardium is the middle layer and consists of cardiac muscle tissue. It is responsible for the contraction of the heart, allowing it to pump blood throughout the body.

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  • 13. 

    What is the 3rd layer of the heart wall?

    • A.

      Epicardium (same as visceral layer)

    • B.

      Myocardium (heart muscle)

    • C.

      Endocardium (lining of cavities 

    • D.

      Option 4

    Correct Answer
    C. Endocardium (lining of cavities 
    Explanation
    The correct answer is endocardium. The endocardium is the innermost layer of the heart wall and it lines the cavities of the heart, including the chambers and valves. It is composed of a thin layer of endothelial cells and connective tissue.

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  • 14. 

    What elastic type structure covers the R and L atrium? 

    • A.

      Pericardium

    • B.

      Auricle of L or R atrium

    • C.

      Aorta

    • D.

      Option 4

    Correct Answer
    B. Auricle of L or R atrium
    Explanation
    The auricle of the left or right atrium is a structure that covers the atrium. The pericardium is a fibrous sac that surrounds the heart, not specifically the atrium. The aorta is the main artery that carries oxygenated blood from the heart to the rest of the body and is not a structure that covers the atrium. Therefore, the correct answer is the auricle of the left or right atrium.

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  • 15. 

    Which are bigger atriums or ventricles?

    • A.

      Atrium

    • B.

      None

    • C.

      Ventricles

    • D.

      Option 4

    Correct Answer
    C. Ventricles
    Explanation
    The ventricles are bigger than the atriums. The atriums are the two upper chambers of the heart, while the ventricles are the two lower chambers. The ventricles are responsible for pumping blood to the rest of the body, so they need to be larger and more muscular than the atriums. This allows them to generate enough force to push the blood out of the heart and into the arteries.

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  • 16. 

    The function of superior and inferior vena cava

    • A.

      Both bring deoxygenated blood to the right atrium

    • B.

      Both bring blood away from the heart to the rest of the body

    • C.

      Nothing

    • D.

      Option 4

    Correct Answer
    A. Both bring deoxygenated blood to the right atrium
    Explanation
    Both the superior and inferior vena cava are large veins that bring deoxygenated blood back to the heart. The superior vena cava carries blood from the upper body, including the head, neck, and upper limbs, while the inferior vena cava carries blood from the lower body, including the abdomen and lower limbs. Both veins empty into the right atrium of the heart, where the blood is then pumped to the lungs to receive oxygen. Therefore, the correct answer is that both the superior and inferior vena cava bring deoxygenated blood to the right atrium.

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  • 17. 

    The function of left pulmonary veins

    • A.

      Bring deoxygenated blood from lungs

    • B.

      Bring oxygenated blood from lungs

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    B. Bring oxygenated blood from lungs
    Explanation
    The left pulmonary veins are responsible for bringing oxygenated blood from the lungs.

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  • 18. 

    How does oxygenated blood travel?

    • A.

      From left pulmonary veins, left atrium, left ventricle, aorta

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. From left pulmonary veins, left atrium, left ventricle, aorta
    Explanation
    Oxygenated blood travels from the lungs through the left pulmonary veins into the left atrium of the heart. From there, it moves into the left ventricle, which pumps the blood out into the aorta, the largest artery in the body. The aorta then carries the oxygenated blood to the rest of the body, supplying oxygen to the organs and tissues.

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  • 19. 

    Whar are the. three parts of the aorta

    • A.

      Ascending aorta

    • B.

      Aortic arch

    • C.

      Descending aorta

    • D.

      All

    Correct Answer
    D. All
    Explanation
    The three parts of the aorta are the ascending aorta, aortic arch, and descending aorta. The ascending aorta starts from the left ventricle of the heart and goes up towards the aortic arch. The aortic arch is a curved part of the aorta that gives rise to the brachiocephalic trunk, left common carotid artery, and left subclavian artery. The descending aorta continues from the aortic arch and goes down towards the abdomen. Therefore, the correct answer is that all of these parts make up the aorta.

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  • 20. 

    What sits on the wall that is between the R and L ventricle?

    • A.

      Posterior interventricular sulcus

    • B.

      Anterior interventricular sulcus

    • C.

      Aorta

    • D.

      Option 4

    Correct Answer
    B. Anterior interventricular sulcus
    Explanation
    The correct answer is the anterior interventricular sulcus. The anterior interventricular sulcus is a groove that runs along the front of the heart between the right and left ventricles. It contains important blood vessels, such as the anterior interventricular artery, which supplies oxygenated blood to the heart muscle. The other options mentioned, such as the posterior interventricular sulcus and the aorta, are not located between the R and L ventricles.

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  • 21. 

    Why is the anterior interventricular sulcus important?

    • A.

      Bc important vessels sit here like the anterior ventricular artery and great cardiac vein

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Bc important vessels sit here like the anterior ventricular artery and great cardiac vein
    Explanation
    The anterior interventricular sulcus is important because it houses important vessels such as the anterior ventricular artery and the great cardiac vein. These vessels are crucial for supplying oxygenated blood to the heart muscle and draining deoxygenated blood from the heart. The presence of these vessels in the anterior interventricular sulcus highlights its significance in the overall functioning of the cardiovascular system.

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  • 22. 

    How does de-oxygenated blood travel?

    • A.

      From superior and inferior vena cava, right atrium, right ventricle, pulmonary trunk, R and L pulmonary artery

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. From superior and inferior vena cava, right atrium, right ventricle, pulmonary trunk, R and L pulmonary artery
    Explanation
    De-oxygenated blood travels through the circulatory system in a specific pathway. It first enters the heart through the superior and inferior vena cava, which are large veins that bring blood from the upper and lower body respectively. The blood then flows into the right atrium, which is one of the chambers of the heart. From there, it is pumped into the right ventricle, another chamber of the heart. The right ventricle then contracts and pumps the blood into the pulmonary trunk, which is a large blood vessel. The pulmonary trunk divides into the right and left pulmonary arteries, which carry the de-oxygenated blood to the lungs for oxygenation.

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  • 23. 

    What sits in the posterior interventricular sulcus? 

    • A.

      Poster interventricular artery

    • B.

      Middle cardiac vein

    • C.

      Both

    • D.

      Option 4

    Correct Answer
    C. Both
    Explanation
    Both the posterior interventricular artery and the middle cardiac vein sit in the posterior interventricular sulcus. The posterior interventricular artery supplies oxygenated blood to the posterior walls of the ventricles, while the middle cardiac vein drains deoxygenated blood from the same area. Therefore, both structures are present in the posterior interventricular sulcus.

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  • 24. 

    What is the R. AV valve (atrioventricular) called?

    • A.

      Tricuspid

    • B.

      Bicuspid

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Tricuspid
    Explanation
    The R. AV valve, also known as the right atrioventricular valve, is called the tricuspid valve. This valve is located between the right atrium and the right ventricle of the heart. It is named tricuspid because it consists of three leaflets or cusps that open and close to regulate blood flow between the atrium and ventricle.

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  • 25. 

    What is the L. AV valve called?

    • A.

      Tricuspid

    • B.

      Bicuspid

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    B. Bicuspid
    Explanation
    The L. AV valve is called the bicuspid valve. This valve is located between the left atrium and the left ventricle in the heart. It is called bicuspid because it has two cusps or flaps that open and close to allow blood to flow from the left atrium into the left ventricle and prevent backflow. The bicuspid valve is also known as the mitral valve.

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  • 26. 

    What are the string-like structures that hold the R and L valves down called?

    • A.

      Papillary muscle 

    • B.

      Aortic semilunar valve

    • C.

      Chordae tendinae

    • D.

      Option 4

    Correct Answer
    C. Chordae tendinae
    Explanation
    Chordae tendinae are string-like structures that attach the papillary muscles to the valves of the heart, specifically the R and L valves. These structures help to hold the valves in place and prevent them from prolapsing or leaking.

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  • 27. 

    The function of the papillary muscle? 

    • A.

      Option 1

    • B.

      Anchors chordae tendinae so AV valves don't collapse in atrium

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Option 1
    Explanation
    The papillary muscles are responsible for anchoring the chordae tendinae, which are thin strands of connective tissue, to the atrioventricular (AV) valves in the heart. This prevents the valves from collapsing into the atrium when the ventricles contract and helps to maintain the proper direction of blood flow through the heart.

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  • 28. 

    What valves prevent blood from going back into the aorta?

    • A.

      Aortic semilunar valve

    • B.

      Left AV valve

    • C.

      Pulmonary semilunar valve

    • D.

      All

    Correct Answer
    D. All
    Explanation
    The correct answer is "all". All of the listed valves - aortic semilunar valve, left AV valve, and pulmonary semilunar valve - prevent blood from flowing back into the aorta. These valves ensure that blood flows in one direction, preventing any regurgitation or backflow of blood.

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  • 29. 

    Where is the pectinate muscle located?

    • A.

      Only in R and L atrium

    • B.

      In aorta

    • C.

      In av valves

    • D.

      Option 4

    Correct Answer
    A. Only in R and L atrium
    Explanation
    The pectinate muscle is located only in the right and left atrium of the heart. It is a ridge-like structure composed of muscular fibers that help in increasing the surface area of the atria, allowing for more efficient contraction and blood flow. This muscle is absent in other parts of the heart, such as the aorta and AV valves.

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  • 30. 

    Location of fossa ovalis?

    • A.

      Aorta

    • B.

      Only in atrium

    • C.

      Heart

    • D.

      Option 4

    Correct Answer
    B. Only in atrium
    Explanation
    The fossa ovalis is a depression in the interatrial septum of the heart, specifically in the right atrium. It is a remnant of the fetal structure called the foramen ovale, which allows blood to bypass the lungs in utero. After birth, the foramen ovale closes, leaving behind the fossa ovalis. Therefore, the correct answer is "only in atrium."

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  • 31. 

    What is the wall the separates the R and L ventricle?

    • A.

      Interventricular wall

    • B.

      Interventricular septum

    • C.

      None

    • D.

      Option 4

    Correct Answer
    B. Interventricular septum
    Explanation
    The wall that separates the right and left ventricles of the heart is called the interventricular septum. This structure plays a crucial role in maintaining the separation of oxygenated and deoxygenated blood within the heart. It prevents the mixing of blood between the two ventricles, ensuring that oxygen-rich blood is pumped to the body and oxygen-poor blood is sent to the lungs for oxygenation.

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  • 32. 

    How is blood supposed to move

    • A.

      Multiple directions

    • B.

      2 directions

    • C.

      Only in one direction

    • D.

      Option 4

    Correct Answer
    C. Only in one direction
    Explanation
    Blood is supposed to move only in one direction due to the presence of valves in the veins. These valves prevent the backflow of blood and ensure that it flows in a forward direction towards the heart. This unidirectional flow is essential for the efficient functioning of the circulatory system, as it allows oxygenated blood to reach the body's tissues and organs while deoxygenated blood is returned to the heart for oxygenation.

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  • 33. 

    Function of R and L AV valves?

    • A.

      They close before the heart contracts so when blood goes up into aorta it doesn't come back down into atrium

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. They close before the heart contracts so when blood goes up into aorta it doesn't come back down into atrium
    Explanation
    The function of the R and L AV valves is to close before the heart contracts. This prevents the backflow of blood from the aorta back into the atrium. By closing the valves, the blood is directed forward into the aorta, ensuring efficient blood circulation throughout the body.

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  • 34. 

    Location of pulmonary semilunar valve?

    • A.

      Between R and L ventricle

    • B.

      Between the R ventricle and pulmonary trunk

    • C.

      Between r and l pulmonary vein 

    • D.

      Option 4

    Correct Answer
    B. Between the R ventricle and pulmonary trunk
    Explanation
    The pulmonary semilunar valve is located between the right ventricle and the pulmonary trunk. This valve prevents the backflow of blood from the pulmonary trunk into the right ventricle during ventricular relaxation.

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  • 35. 

    Location of L AV valve

    • A.

      Between the r ventricle and pulmonary trunk

    • B.

      Between the L atrium and L ventricle

    • C.

      Between the l ventricle and ascending aorta

    • D.

      Option 4

    Correct Answer
    B. Between the L atrium and L ventricle
    Explanation
    The L AV valve is located between the L atrium and L ventricle. This valve, also known as the mitral valve, ensures that blood flows in one direction from the atrium to the ventricle. It prevents backflow of blood into the atrium when the ventricle contracts.

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  • 36. 

    Location of aortic valve?

    • A.

      Between L ventricle and ascending aorta

    • B.

      Between R ventricle and pulmonary trunk

    • C.

      Between L atrium and L ventricle

    • D.

      Option 4

    Correct Answer
    A. Between L ventricle and ascending aorta
    Explanation
    The aortic valve is located between the left ventricle and the ascending aorta. This valve allows blood to flow from the left ventricle into the aorta, which is the main artery that carries oxygenated blood to the rest of the body.

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  • 37. 

    What CT is in between the ventricles and atoms 

    • A.

      Epithelium CT

    • B.

      Fibrous CT

    • C.

      Muscular CT

    • D.

      Option 4

    Correct Answer
    B. Fibrous CT
    Explanation
    Fibrous CT is the correct answer because it is the type of connective tissue that is found between the ventricles and atoms. Fibrous CT is characterized by its dense arrangement of collagen fibers, which provide strength and support to various body structures. It is commonly found in tendons, ligaments, and the outer layer of organs. In this context, fibrous CT likely plays a role in connecting and supporting the ventricles and atoms, ensuring their proper function and structural integrity.

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  • 38. 

    Why is the L ventricle thicker than the R ventricle?

    • A.

      Bc there is more pressure in the left ventricle so the muscles are thicker

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Bc there is more pressure in the left ventricle so the muscles are thicker
    Explanation
    The left ventricle is responsible for pumping oxygenated blood to the entire body, while the right ventricle only pumps blood to the lungs. The increased pressure in the left ventricle is due to the fact that it has to pump blood to a larger distance and overcome a higher resistance. To meet this demand, the muscles of the left ventricle are thicker and more powerful, enabling it to generate the necessary force to pump blood effectively.

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  • 39. 

    What branches off from the ascending aorta?

    • A.

      The left coronary artery

    • B.

      The right coronary artery

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    B. The right coronary artery
    Explanation
    The ascending aorta branches off into two main arteries: the left coronary artery and the right coronary artery. These arteries supply oxygenated blood to the heart muscle. The left coronary artery supplies blood to the left side of the heart, including the left ventricle and left atrium. The right coronary artery supplies blood to the right side of the heart, including the right ventricle and right atrium. Therefore, the correct answer is the right coronary artery.

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  • 40. 

    What arteries bring blood to the heart

    • A.

      Option 1

    • B.

      R and L coronary arteries 

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    B. R and L coronary arteries 
    Explanation
    The correct answer is R and L coronary arteries. The coronary arteries are responsible for supplying oxygenated blood to the heart muscle. The right coronary artery (RCA) and the left coronary artery (LCA) branch off from the aorta and provide blood to different regions of the heart. The RCA supplies blood to the right atrium, right ventricle, and part of the left ventricle, while the LCA supplies blood to the left atrium, left ventricle, and part of the right ventricle. These arteries play a crucial role in maintaining the heart's function and overall cardiovascular health.

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  • 41. 

    What is it called when ventricles contract? 

    • A.

      Ventricular diastole

    • B.

      Ventricular systole 

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    B. Ventricular systole 
    Explanation
    When the ventricles contract, it is called ventricular systole. During this phase, the blood is pumped out of the ventricles and into the arteries. This contraction is responsible for the forceful ejection of blood and the generation of blood pressure. Ventricular systole is an important part of the cardiac cycle and is followed by ventricular diastole, which is the relaxation phase of the ventricles.

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  • 42. 

    When ventricles relax what is it called

    • A.

      Ventricular diastole

    • B.

      Ventricular systole

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Ventricular diastole
    Explanation
    When the ventricles relax, it is referred to as ventricular diastole. During this phase, the ventricles fill with blood from the atria. This relaxation allows the ventricles to refill and prepare for the next contraction. Ventricular systole, on the other hand, is the phase when the ventricles contract and pump blood out of the heart.

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  • 43. 

    What is pericardium and what are its layers

    • A.

      Pericardium is a double layer sac that surrounds the heart

    • B.

      Parietal layer of serous pericardium and visceral layer of serous pericardium

    • C.

      A and b

    • D.

      Option 4

    Correct Answer
    C. A and b
    Explanation
    The pericardium is a double-layer sac that surrounds the heart. It consists of two layers: the parietal layer of serous pericardium and the visceral layer of serous pericardium. These layers provide protection and support to the heart, preventing it from rubbing against surrounding structures and allowing it to move smoothly within the chest cavity. Therefore, option 4, which states that the pericardium has both the parietal and visceral layers, is the correct answer.

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  • 44. 

     What is the muscle name that is found in atriums? What is the muscle that is found in ventricles?

    • A.

      The pectinate muscle is found in the atrium

    • B.

      Papillary muscle and trabecular craneae is found in the ventricles

    • C.

      All

    • D.

      Option 4

    Correct Answer
    C. All
    Explanation
    The explanation for the correct answer is that all of the mentioned muscles are found in both the atriums and ventricles. The pectinate muscle is found in the atriums, while the papillary muscle and trabecular carneae are found in the ventricles. Therefore, the correct answer is that all of these muscles are present in both the atriums and ventricles.

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  • 45. 

    What is the name of the valve between Right atrium and right ventricle? What about left atrium and left ventricles?

    • A.

      The right atrioventricular valve or the tricuspid valve.

    • B.

      The left atrioventricular valve or the bicuspid valve

    • C.

      All

    • D.

      Option 4

    Correct Answer
    C. All
    Explanation
    The given correct answer states that the valve between the right atrium and right ventricle is called the right atrioventricular valve or the tricuspid valve. Similarly, the valve between the left atrium and left ventricle is called the left atrioventricular valve or the bicuspid valve. Therefore, both options 1 and 2 are correct, making the answer "all".

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  • 46. 

    What are the two semilunar valves and where do we find each one?

    • A.

      Aortic semilunar valve: found between left ventricle and ascending aorta

    • B.

      Pulmonary semilunar valve: found between right ventricle and pulmonary trunk

    • C.

      All

    • D.

      Option 4

    Correct Answer
    C. All
    Explanation
    The correct answer is "all" because both the aortic semilunar valve and the pulmonary semilunar valve are found in the locations mentioned. The aortic semilunar valve is located between the left ventricle and the ascending aorta, while the pulmonary semilunar valve is located between the right ventricle and the pulmonary trunk.

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  • 47. 

    Where do we find coronary sulcus? What seats there?

    • A.

      Found between the atrium and ventricles

    • B.

      Coronary sinus and multiple arteries

    • C.

      All

    • D.

      Option 4

    Correct Answer
    C. All
    Explanation
    The coronary sulcus is found between the atrium and ventricles of the heart. It is a groove that marks the external boundary between the atria and ventricles. The coronary sinus, which is a large vein that collects blood from the heart muscle, as well as multiple arteries also pass through the coronary sulcus. Therefore, the correct answer is that all of these structures can be found in the coronary sulcus.

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  • 48. 

     What vessels are found in anterior interventricular sulcus? What about posterior interventricular sulcus?

    • A.

      In anterior interventricular sulcus: great cardiac vein, anterior interventricular artery

    • B.

      In posterior interventricular sulcus: middle cardiac vein, posterior interventricular artery

    • C.

      All

    • D.

      Option 4

    Correct Answer
    C. All
    Explanation
    The vessels found in the anterior interventricular sulcus are the great cardiac vein and the anterior interventricular artery. The great cardiac vein drains blood from the heart muscle, while the anterior interventricular artery supplies oxygenated blood to the heart muscle. In the posterior interventricular sulcus, the vessels present are the middle cardiac vein and the posterior interventricular artery. The middle cardiac vein drains blood from the posterior part of the heart, and the posterior interventricular artery supplies oxygenated blood to the posterior part of the heart muscle. Therefore, all of these vessels are found in both the anterior and posterior interventricular sulci.

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  • 49. 

    What structure from the heart sits to the left

    • A.

      Apex of heart

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Apex of heart
    Explanation
    The apex of the heart is the pointed, bottom portion of the heart that is located to the left. It is formed by the left ventricle, which is the chamber responsible for pumping oxygenated blood to the rest of the body. The apex of the heart is important for cardiac function as it helps to ensure efficient blood flow and proper circulation throughout the body.

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  • 50. 

    What is the muscle in the wall of the ventricles

    • A.

      Trabeculae carnae

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    A. Trabeculae carnae
    Explanation
    The correct answer is trabeculae carnae. Trabeculae carnae refers to the muscular ridges and columns found on the internal surface of the ventricles in the heart. These structures help to increase the surface area of the ventricles, allowing for more efficient contraction and pumping of blood.

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