Hap cardio mcq flashcards

All 48 cards

1. Card 1

   Which of the following best describes the primary function of the circulatory system?

   A. The primary function of the circulatory system is to transport oxygen, nutrients, and hormones throughout the body, and to remove waste products. It also plays a role in fluid balance and defense.

2. Card 2

   The cardiovascular system is composed of which of the following?

   B. The cardiovascular system consists of the heart and blood vessels, which work together to move blood throughout the body.

3. Card 3

   What is the main role of red blood cells in the cardiovascular system?

   C. Red blood cells are primarily responsible for oxygen transport, carrying oxygen from the lungs to the body's tissues.

4. Card 4

   Which blood component is responsible for clotting and emergency repair?

   D. Platelets are crucial for initiating blood clotting and performing emergency repairs to damaged blood vessels.

5. Card 5

   Which type of blood vessel is characterized by a one-cell thick wall and is the primary site for exchange of O2/nutrients and CO2/waste?

   C. Capillaries have one-cell thick walls, are very narrow, and have a large surface area, making them ideal for the exchange of substances between blood and tissues.

6. Card 6

   What happens during vasoconstriction in an arteriole?

   A. Vasoconstriction is when an arteriole narrows, which reduces blood flow to the tissues, leading to fewer deliveries of oxygen and nutrients.

7. Card 7

   At which end of the capillary bed does filtration primarily occur?

   A. Filtration occurs at the arteriole end of the capillary bed due to high pressure, pushing fluid, oxygen, glucose, and ions out into the tissues.

8. Card 8

   Which of the following systems is directly linked to the cardiovascular system for the production of blood cells?

   B. The skeletal system, specifically bone marrow, is responsible for producing blood cells, which are then transported by the cardiovascular system.

9. Card 9

   Where is the heart primarily located within the thoracic cavity?

   A. The heart is located in the mediastinum, which is the central thoracic cavity, behind and slightly to the left of the sternum, between the lungs.

10. Card 10

    Which layer of the heart wall is composed of cardiac muscle and is responsible for pumping blood?

    B. The myocardium is the middle layer of the heart wall, consisting of cardiac muscle, and is primarily responsible for the heart's contractile function.

11. Card 11

    What is the function of the superior vena cava?

    D. The superior vena cava returns deoxygenated blood from the upper body to the right atrium of the heart.

12. Card 12

    Which major vessel distributes oxygenated blood from the left ventricle to the entire body?

    C. The aorta is the largest artery in the body and is responsible for distributing oxygenated blood from the left ventricle to systemic circulation.

13. Card 13

    A blockage in which artery is often referred to as the 'widow-maker' due to its critical supply to the front of the heart and interventricular septum?

    B. The Left Anterior Descending (LAD) artery, a branch of the Left Coronary Artery, is known as the 'widow-maker' because its blockage can lead to extensive heart damage.

14. Card 14

    Which component of the heart's conduction system is known as the natural pacemaker?

    A. The SA (sinoatrial) node, located in the right atrium, is the heart's natural pacemaker, initiating electrical impulses at 70-80 impulses/min.

15. Card 15

    During which phase of the cardiac cycle do the ventricles contract and pump blood into the aorta?

    B. Ventricular systole is the phase where the ventricles contract, increasing pressure and pumping blood into the aorta and pulmonary trunk.

16. Card 16

    What is the primary role of plasma in the blood?

    A. Plasma is the liquid component of blood that carries dissolved substances, including nutrients, hormones, and waste products, throughout the body.

17. Card 17

    Which blood vessel type is described as large, high-pressure, and thick-walled, carrying blood away from the heart quickly?

    A. Arteries are characterized by their large size, high pressure, and thick walls, which enable them to rapidly transport blood away from the heart.

18. Card 18

    What is the main function of the lymphatic system in relation to the circulatory system?

    B. The lymphatic system works with the cardiovascular system by returning excess tissue fluid to the blood and supporting immunity.

19. Card 19

    Which of the following statements accurately describes the reabsorption process at the venule end of a capillary?

    C. At the venule end, lower pressure combined with osmotic pull from blood proteins causes fluid to move back into the capillaries from the tissues.

20. Card 20

    How does the integumentary system interact with the cardiovascular system?

    D. The integumentary system (skin) uses blood flow, regulated by the cardiovascular system, to control body temperature and maintain skin health.

21. Card 21

    Which chamber of the heart receives deoxygenated blood from the upper body?

    A. The right atrium receives deoxygenated blood from the superior vena cava, which drains the upper body.

22. Card 22

    What is the consequence of reduced oxygen to the myocardium, often resulting in chest pain?

    B. Reduced oxygen to the myocardium leads to angina, which is chest pain caused by insufficient blood flow to the heart muscle.

23. Card 23

    Which part of the heart's conduction system fires at 40-60 impulses/min, acting as a backup pacemaker?

    B. The AV (atrioventricular) node fires at 40-60 impulses/min and can take over as the pacemaker if the SA node fails.

24. Card 24

    What is the primary mechanism by which heart valves open and close?

    C. Heart valves open and close primarily due to pressure differences between the heart chambers and major vessels, ensuring unidirectional blood flow.

25. Card 25

    Which of the following is a structural feature of capillaries that facilitates efficient exchange?

    D. Capillaries have a large surface area, are very narrow, and have slow blood flow, all of which enhance the exchange of substances between blood and tissues.

26. Card 26

    Which of the following describes the primary function of the right pump of the heart?

    A. The right pump receives deoxygenated blood from the body's tissues and sends it to the pulmonary circulation (lungs) for oxygenation.

27. Card 27

    A patient is diagnosed with a blockage in the artery often referred to as the 'widow-maker.' Which artery is most likely affected?

    B. The Left Anterior Descending (LAD) artery is known as the 'widow-maker' because it supplies the front of the heart and the interventricular septum, and its blockage can lead to severe myocardial infarction.

28. Card 28

    What is the primary role of the SA node in the cardiac conduction system?

    C. The SA node acts as the heart's natural pacemaker, initiating electrical impulses at a rate of 70-80 impulses/min, which then spread throughout the atria.

29. Card 29

    A patient presents with symptoms including tiredness, shortness of breath, and pulmonary oedema. These symptoms are most indicative of which cardiovascular condition?

    A. These symptoms are characteristic of heart failure, a complex syndrome where the heart cannot pump enough blood to meet the body's metabolic demands.

30. Card 30

    Which of the following medications is primarily used to lower LDL cholesterol and slow plaque progression in patients with atherosclerosis?

    D. Statins are a class of medications specifically prescribed to lower LDL cholesterol levels, thereby helping to slow the progression of atherosclerotic plaque formation.

31. Card 31

    Which surgical intervention involves using a balloon catheter to widen a narrowed artery?

    A. Angioplasty is a surgical procedure where a balloon-tipped catheter is inserted into a narrowed artery and inflated to widen the lumen, improving blood flow.

32. Card 32

    What is the main function of the circumflex artery, a branch of the Left Coronary Artery (LCA)?

    C. The circumflex artery supplies blood to the left atrium and the lateral wall of the left ventricle.

33. Card 33

    If the SA node fails, which part of the conduction system typically takes over as the secondary pacemaker, albeit at a slower rate?

    A. If the SA node fails, the AV node typically takes over as the pacemaker, firing at a slower rate of 40-60 impulses/min.

34. Card 34

    What is the primary consequence of reduced oxygen supply to the myocardium, often due to coronary artery blockage?

    C. Reduced oxygen to the myocardium can lead to angina (chest pain from reduced flow) or, if severe and prolonged, myocardial infarction (tissue death).

35. Card 35

    Which of the following is NOT a risk factor for heart failure?

    D. While a healthy diet is a treatment for heart failure, it is not a risk factor. Coronary artery disease, hypertension, and diabetes mellitus are all established risk factors.

36. Card 36

    A patient undergoes a procedure where a mesh tube is placed in an artery to keep it open after angioplasty. What is this procedure called?

    B. A stent is a mesh tube that is deployed to keep an artery open, typically after an angioplasty procedure, to prevent re-narrowing.

37. Card 37

    What is the definition of atherosclerosis?

    A. Atherosclerosis is defined as the build-up of fatty plaques in the arterial walls, leading to a narrowed lumen and reduced blood flow.

38. Card 38

    Which of the following best describes the function of the left pump of the heart?

    C. The left pump receives oxygenated blood from the lungs and then pumps it to the systemic circulation (the rest of the body).

39. Card 39

    What happens during the relaxation/diastole phase of the cardiac cycle?

    D. During relaxation/diastole, the heart relaxes, and the ventricles refill with blood in preparation for the next contraction.

40. Card 40

    Which of the following is a key principle that ensures blood flows in one direction only within the heart?

    A. Heart valves open and close due to pressure differences, which is a crucial mechanism ensuring unidirectional blood flow and preventing backflow.

41. Card 41

    A patient is experiencing chest pain due to reduced blood flow to the heart muscle, but no tissue death has occurred yet. This condition is known as:

    B. Angina is chest pain caused by reduced oxygen supply to the myocardium, often a precursor to or symptom of more severe coronary artery disease.

42. Card 42

    What is the primary function of the Pulmonary Trunk?

    C. The Pulmonary Trunk carries deoxygenated blood from the right ventricle to the lungs for oxygenation.

43. Card 43

    Which of the following treatments for heart failure aims to reduce fluid retention?

    A. Diuretics are medications commonly used in heart failure treatment to help the body excrete excess fluid, reducing symptoms like oedema and shortness of breath.

44. Card 44

    What is the main purpose of an artificial pacemaker?

    B. An artificial pacemaker is a device designed to replace the SA node's impulse generation, delivering electrical signals directly to the heart muscle to regulate its rhythm.

45. Card 45

    Which coronary artery supplies the right atrium and right ventricle?

    A. The Right Coronary Artery (RCA) is responsible for supplying blood to the right atrium and the right ventricle, and it also contributes to the posterior descending artery.

46. Card 46

    What is the consequence of plaque rupture in atherosclerosis?

    D. Plaque rupture in atherosclerosis can lead to the formation of a blood clot, which can cause partial or full blockage of the artery, potentially resulting in a myocardial infarction.

47. Card 47

    Which of the following is a lifestyle treatment recommended for atherosclerosis?

    C. Regular exercise is a crucial lifestyle modification recommended for managing atherosclerosis, as it helps improve cardiovascular health and can slow plaque progression.

48. Card 48

    What is the mechanism by which risk factors like hypertension contribute to heart failure?

    A. Risk factors like hypertension increase cardiac strain over time, leading to progressive weakening or stiffening of the myocardium, which ultimately reduces the heart's ability to pump blood effectively.

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