Anatomy Anatomy of the Heart Questions and Answers

Question 1

A patient is diagnosed with an issue in the heart's natural pacemaker. Which structure is primarily affected?

Accepted Answer

Sinoatrial (SA) node

Answer

Atrioventricular (AV) node

Answer

Purkinje fibers

Answer

Bundle of His

Question 2

Which layer of the heart wall is the thickest and composed primarily of cardiac muscle tissue responsible for the heart's pumping action?

Accepted Answer

Myocardium

Answer

Endocardium

Answer

Epicardium

Answer

Pericardium

Question 3

Deoxygenated blood from the systemic circuit enters the heart through which chamber?

Accepted Answer

Right atrium

Answer

Left atrium

Answer

Right ventricle

Answer

Left ventricle

Question 4

Which of the following structures are responsible for preventing the atrioventricular valves from prolapsing into the atria during ventricular contraction?

Accepted Answer

Chordae tendineae and papillary muscles

Answer

Semilunar valves

Answer

Trabeculae carneae

Answer

Pectinate muscles

Question 5

A blockage in the left anterior descending artery, a branch of the left coronary artery, would most likely compromise blood flow to which areas of the heart?

Accepted Answer

Anterior two-thirds of the interventricular septum and anterior walls of both ventricles

Answer

Right atrium and right ventricle

Answer

SA node and AV node

Answer

Posterior wall of the left ventricle

Question 6

Following oxygenation in the lungs, blood returns to the heart and enters the left atrium through which vessels?

Accepted Answer

Pulmonary Veins

Answer

Superior and Inferior Vena Cava

Answer

Pulmonary Arteries

Answer

Aorta