CCT Cardiac Anatomy & Physiology 4

Question 1

Which of the following vessels returns oxygenated blood from the lungs to the left atrium?

Accepted Answer

Pulmonary veins

Answer

The four pulmonary veins return oxygenated blood from the lungs to the left atrium, completing the pulmonary circulation.

Question 2

The Bundle of His divides into left and right bundle branches at which anatomical location?

Accepted Answer

Top of the interventricular septum

Answer

After passing through the AV node, the Bundle of His descends through the fibrous skeleton and divides into left and right bundle branches at the superior interventricular septum.

Question 3

Which coronary artery is most commonly referred to as the 'widow maker' due to the large territory it supplies?

Accepted Answer

Left anterior descending artery

Answer

The left anterior descending (LAD) artery supplies the anterior wall and a large portion of the interventricular septum; its occlusion causes massive anterior MI with high mortality.

Question 4

What is the approximate normal ejection fraction of the left ventricle?

Accepted Answer

55–70%

Answer

Normal left ventricular ejection fraction (LVEF) is 55–70%, representing the percentage of end-diastolic volume ejected with each beat.

Question 5

The tricuspid valve has how many leaflets?

Accepted Answer

Three

Answer

The tricuspid (right AV) valve has three leaflets — anterior, posterior, and septal — which close during systole to prevent backflow into the right atrium.

(CCT) Certified Cardiac Technician Practice Test

(CCT) Certified Cardiac Technician Practice Test

CCT Cardiac Anatomy & Physiology 4