AMCA EKG Practice Test (100 Questions)Exam Questions 41–60 2026–2027 Review • Original practice

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AMCA EKG Practice Test (100 Questions)

Section 1: Cardiac Anatomy & Physiology (Questions 1–20)

1. Which chamber of the heart receives deoxygenated blood from the superior and
inferior vena cava?
A. Left atrium
B. Right atrium
C. Left ventricle
D. Right ventricle
Answer: B

2. The pacemaker cells of the heart are located primarily in which structure?
A. Atrioventricular (AV) node
B. Purkinje fibers
C. Sinoatrial (SA) node
D. Bundle of His
Answer: C

3. What is the normal intrinsic firing rate of the sinoatrial (SA) node?
A. 20–40 beats per minute
B. 40–60 beats per minute
C. 60–100 beats per minute
D. 100–160 beats per minute
Answer: C

4. Which layer of the heart is responsible for the contractile function?
A. Epicardium
B. Endocardium
C. Myocardium
D. Pericardium
Answer: C

5. The atrioventricular (AV) node is located in which area of the heart?
A. Right atrium near the SA node
B. Inferior portion of the interatrial septum
C. Ventricular septum
D. Left ventricular wall
Answer: B

6. What is the primary function of the Purkinje fibers?
A. Initiate cardiac impulses
B. Delay cardiac impulses
C. Rapidly conduct impulses through the ventricles

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D. Conduct impulses from the atria to the ventricles
Answer: C

7. Which coronary artery primarily supplies blood to the left ventricle?
A. Right coronary artery
B. Left anterior descending artery
C. Circumflex artery
D. Posterior descending artery
Answer: B

8. The heart is located in which cavity of the body?
A. Cranial cavity
B. Abdominal cavity
C. Thoracic cavity
D. Pelvic cavity
Answer: C

9. Which valve is located between the right atrium and the right ventricle?
A. Mitral valve
B. Aortic valve
C. Pulmonic valve
D. Tricuspid valve
Answer: D

10. What are the three layers of the heart wall?
A. Epicardium, myocardium, endocardium
B. Pericardium, myocardium, endocardium
C. Epicardium, pericardium, endocardium
D. Myocardium, endocardium, pericardium
Answer: A

11. The atrioventricular valve between the left atrium and left ventricle is:
A. Tricuspid valve
B. Mitral valve
C. Pulmonic valve
D. Aortic valve
Answer: B

12. The wall that separates the two superior chambers of the heart is called:
A. Interventricular septum
B. Interatrial septum
C. Pericardial septum
D. Atrioventricular septum
Answer: B

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13. The heart receives most of its own blood supply via:
A. Pulmonary arteries
B. Coronary arteries
C. Aortic arch
D. Carotid arteries
Answer: B

14. The cardiac accelerator center is part of the:
A. Parasympathetic nervous system
B. Sympathetic nervous system
C. Central nervous system
D. Peripheral nervous system
Answer: B

15. The most muscular chamber of the heart that forces blood through the aortic valve is
the:
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Answer: D

16. During which phase of the cardiac cycle do the coronary arteries fill?
A. Early diastole
B. Late diastole
C. Early systole
D. Late systole
Answer: A

17. How much blood coming into the ventricles flows passively through the atria?
A. 30%
B. 50%
C. 70%
D. 90%
Answer: C

18. During depolarization, what happens?
A. Positively charged ions move outside the cell
B. Positively charged ions move inside the cell
C. The cell becomes negatively charged
D. No ion movement occurs
Answer: B