Human Heart Multiple Choice Questions
Human Heart Multiple Choice Questions
50 multiple-choice questions (MCQs) based on the human heart along with the correct answers:
1. Which chamber of the heart receives deoxygenated blood from the body?
A) Left atrium
B) Right atrium
C) Left ventricle
D) Right ventricle
Answer: B) Right atrium
2. Which artery carries deoxygenated blood?
A) Pulmonary artery
B) Aorta
C) Coronary artery
D) Carotid artery
Answer: A) Pulmonary artery
3. What is the main function of the valves in the heart?
A) Pump blood
B) Store blood
C) Prevent backflow of blood
D) Mix oxygenated and deoxygenated blood
Answer: C) Prevent backflow of blood
4. Which valve is located between the left atrium and the left ventricle?
A) Tricuspid valve
B) Mitral valve
C) Pulmonary valve
D) Aortic valve
Answer: B) Mitral valve
5. The heartbeat is regulated by which part of the heart?
A) Atrioventricular node
B) Sinoatrial node
C) Bundle of His
D) Purkinje fibers
Answer: B) Sinoatrial node
6. What is the largest artery in the human body?
A) Pulmonary artery
B) Aorta
C) Coronary artery
D) Carotid artery
Answer: B) Aorta
7. Where does the exchange of gases, nutrients, and waste products occur?
A) Veins
B) Arteries
C) Capillaries
D) Heart
Answer: C) Capillaries
8. What is the average resting heart rate for a healthy adult?
A) 40-60 beats per minute
B) 60-100 beats per minute
C) 100-120 beats per minute
D) 120-140 beats per minute
Answer: B) 60-100 beats per minute
9. Which part of the heart pumps oxygenated blood to the body?
A) Left atrium
B) Right atrium
C) Left ventricle
D) Right ventricle
Answer: C) Left ventricle
10. What is the function of the coronary arteries?
A) Supply blood to the lungs
B) Supply blood to the brain
C) Supply blood to the heart muscle
D) Supply blood to the liver
Answer: C) Supply blood to the heart muscle
11. Which structure separates the left and right sides of the heart?
A) Septum
B) Aorta
C) Tricuspid valve
D) Mitral valve
Answer: A) Septum
12. What is the purpose of the pericardium?
A) To pump blood
B) To protect the heart
C) To oxygenate blood
D) To conduct electrical impulses
Answer: B) To protect the heart
13. Which condition is characterized by the narrowing of coronary arteries?
A) Atherosclerosis
B) Arrhythmia
C) Hypertension
D) Cardiomyopathy
Answer: A) Atherosclerosis
14. What is the term for high blood pressure?
A) Hypotension
B) Hypertension
C) Arrhythmia
D) Bradycardia
Answer: B) Hypertension
15. Which type of blood vessel carries blood away from the heart?
A) Veins
B) Capillaries
C) Arteries
D) Lymphatics
Answer: C) Arteries
16. Which blood vessel returns blood to the heart from the lower body?
A) Superior vena cava
B) Inferior vena cava
C) Pulmonary vein
D) Coronary artery
Answer: B) Inferior vena cava
17. What is the term for the relaxation phase of the heart cycle?
A) Systole
B) Diastole
C) Tachycardia
D) Bradycardia
Answer: B) Diastole
18. Which component of the blood carries oxygen?
A) White blood cells
B) Platelets
C) Plasma
D) Red blood cells
Answer: D) Red blood cells
19. What is the role of hemoglobin in the blood?
A) Clotting
B) Fighting infections
C) Transporting oxygen
D) Maintaining blood pressure
Answer: C) Transporting oxygen
20. What is the normal blood pressure reading for a healthy adult?
A) 80/40 mmHg
B) 120/80 mmHg
C) 140/90 mmHg
D) 100/60 mmHg
Answer: B) 120/80 mmHg
21. Which structure prevents the backflow of blood into the right atrium?
A) Mitral valve
B) Tricuspid valve
C) Pulmonary valve
D) Aortic valve
Answer: B) Tricuspid valve
22. What is an ECG used to measure?
A) Blood pressure
B) Heart rate
C) Electrical activity of the heart
D) Oxygen levels in the blood
Answer: C) Electrical activity of the heart
23. Which chamber of the heart pumps blood to the lungs?
A) Left atrium
B) Right atrium
C) Left ventricle
D) Right ventricle
Answer: D) Right ventricle
24. Which hormone increases heart rate during stress?
A) Insulin
B) Cortisol
C) Adrenaline
D) Thyroxine
Answer: C) Adrenaline
25. What is the innermost layer of the heart wall called?
A) Myocardium
B) Endocardium
C) Epicardium
D) Pericardium
Answer: B) Endocardium
26. Which heart condition is characterized by an irregular heartbeat?
A) Angina
B) Arrhythmia
C) Aneurysm
D) Atherosclerosis
Answer: B) Arrhythmia
27. Which term describes the heart’s ability to generate its own electrical impulses?
A) Conductivity
B) Contractility
C) Automaticity
D) Rhythmicity
Answer: C) Automaticity
28. What is the thickest chamber of the heart?
A) Left atrium
B) Right atrium
C) Left ventricle
D) Right ventricle
Answer: C) Left ventricle
29. Which layer of the heart contains the muscle fibers responsible for contraction?
A) Endocardium
B) Myocardium
C) Epicardium
D) Pericardium
Answer: B) Myocardium
30. Which blood vessels have valves to prevent backflow?
A) Arteries
B) Capillaries
C) Veins
D) Coronary arteries
Answer: C) Veins
31. What is the medical term for a heart attack?
A) Cardiac arrest
B) Myocardial infarction
C) Angina pectoris
D) Arrhythmia
Answer: B) Myocardial infarction
32. Which blood vessel carries oxygenated blood from the lungs to the heart?
A) Pulmonary artery
B) Pulmonary vein
C) Aorta
D) Vena cava
Answer: B) Pulmonary vein
33. Which condition is characterized by chest pain due to reduced blood flow to the heart?
A) Myocardial infarction
B) Angina pectoris
C) Arrhythmia
D) Heart failure
Answer: B) Angina pectoris
34. Which structure initiates the electrical impulses in the heart?
A) AV node
B) SA node
C) Bundle of His
D) Purkinje fibers
Answer: B) SA node
35. What is the main function of the left ventricle?
A) Pump blood to the lungs
B) Receive blood from the lungs
C) Pump blood to the body
D) Receive blood from the body
Answer: C) Pump blood to the body
36. Which term refers to the volume of blood pumped by the heart per minute?
A) Stroke volume
B) Cardiac output
C) Heart rate
D) Blood pressure
Answer: B) Cardiac output
37. Which blood vessels supply the heart muscle with oxygenated blood?
A) Pulmonary veins
B) Coronary arteries
C) Carotid arteries
D) Renal arteries
Answer: B) Coronary arteries
38. What is the role of the AV node in the heart?
A) Initiate heartbeat
B) Delay the impulse to allow ventricles to fill
C) Conduct impulses to the atria
D) Pump blood
Answer: B) Delay the impulse to allow ventricles to fill
39. Which structure separates the left atrium and left ventricle?
A) Tricuspid valve
B) Bicuspid (mitral) valve
C) Aortic valve
D) Pulmonary valve
Answer: B) Bicuspid (mitral) valve
40. What is the medical term for low blood pressure?
A) Hypertension
B) Hypotension
C) Arrhythmia
D) Bradycardia
Answer: B) Hypotension
41. What is the function of the right ventricle?
A) Pump blood to the lungs
B) Pump blood to the body
C) Receive blood from the lungs
D) Receive blood from the body
Answer: A) Pump blood to the lungs
42. What is the term for the period when the heart is contracting?
A) Diastole
B) Systole
C) Bradycardia
D) Tachycardia
Answer: B) Systole
43. Which chamber of the heart has the thickest walls?
A) Left atrium
B) Right atrium
C) Left ventricle
D) Right ventricle
Answer: C) Left ventricle
44. Which condition involves an accumulation of fluid in the pericardial sac?
A) Myocardial infarction
B) Pericarditis
C) Cardiac tamponade
D) Endocarditis
Answer: C) Cardiac tamponade
45. Which blood vessels carry deoxygenated blood to the lungs?
A) Pulmonary arteries
B) Pulmonary veins
C) Aorta
D) Coronary arteries
Answer: A) Pulmonary arteries
46. What is the role of platelets in the blood?
A) Oxygen transport
B) Immune response
C) Blood clotting
D) Nutrient transport
Answer: C) Blood clotting
47. Which part of the ECG represents the ventricular depolarization?
A) P wave
B) QRS complex
C) T wave
D) U wave
Answer: B) QRS complex
48. What is the name of the largest vein in the body?
A) Superior vena cava
B) Inferior vena cava
C) Pulmonary vein
D) Coronary vein
Answer: B) Inferior vena cava
49. Which of the following is a modifiable risk factor for heart disease?
A) Age
B) Gender
C) Smoking
D) Family history
Answer: C) Smoking
50. What is the main role of the heart in the circulatory system?
A) Absorb nutrients
B) Filter waste
C) Pump blood
D) Exchange gases
Answer: C) Pump blood
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