ECG Cardiac Anatomy 2

Question 1

Which valve separates the left atrium from the left ventricle?

Accepted Answer

Mitral valve

Answer

Tricuspid valve

Answer

Pulmonic valve

Answer

Aortic valve

Question 2

The coronary sinus drains deoxygenated blood from the myocardium into which chamber?

Accepted Answer

Right atrium

Answer

Right ventricle

Answer

Left atrium

Answer

Left ventricle

Question 3

Which layer of the heart wall contains the cardiac muscle responsible for contraction?

Accepted Answer

Myocardium

Answer

Pericardium

Answer

Epicardium

Answer

Endocardium

Question 4

The right coronary artery most commonly supplies which structure critical for AV conduction?

Accepted Answer

AV node

Answer

Bundle of His

Answer

Right bundle branch

Answer

SA node

Question 5

Which anatomical landmark divides the right and left sides of the heart externally on the anterior surface?

Accepted Answer

Anterior interventricular groove

Answer

Crista terminalis

Answer

Coronary sulcus

Answer

Posterior interventricular groove

Question 6

Papillary muscles attach to the valve leaflets via which structures?

Accepted Answer

Tendinous cords (chordae tendineae)

Answer

Pectinate muscles

Answer

Trabeculae carneae

Answer

Moderator band

Question 7

Which cardiac chamber has the thickest wall and why?

Accepted Answer

Left ventricle — pumps against systemic vascular resistance

Answer

Right atrium — receives all systemic venous return

Answer

Right ventricle — pumps against pulmonary resistance

Answer

Left atrium — receives high-pressure pulmonary veins