CVT Cardiac Anatomy & Physiology 3

Question 1

The right coronary artery most commonly supplies which structure responsible for the AV node?

Accepted Answer

Right coronary artery

Answer

The AV node is supplied by the AV nodal artery, which arises from the right coronary artery in ~90% of individuals.

Question 2

Which valve prevents backflow of blood from the aorta into the left ventricle?

Accepted Answer

Aortic valve

Answer

The aortic valve closes during diastole to prevent regurgitation of blood from the aorta back into the left ventricle.

Question 3

Cardiac output is defined as which of the following?

Accepted Answer

Stroke volume × heart rate

Answer

Cardiac output = stroke volume × heart rate, representing the volume of blood the heart pumps per minute.

Question 4

The interventricular septum is anatomically and functionally part of which ventricle?

Accepted Answer

Left ventricle

Answer

The interventricular septum is developmentally and functionally considered part of the left ventricle.

Question 5

Which of the following best describes preload?

Accepted Answer

Degree of myocardial stretch at end-diastole

Answer

Preload refers to the ventricular wall stress (stretch) at end-diastole, often approximated by end-diastolic volume or pressure.

(CVT) Cardiovascular Technologist Certification Practice Test