Emergency Medical Technician (EMT) Intermediate Practice Exam

What are the tricuspid and mitral valves of the heart collectively referred to as?

1. Semilunar valves

2. Atrioventricular valves

3. Chordae tendineae valves

4. Valvular insufficiency valves

The correct answer is: Atrioventricular valves

The tricuspid and mitral valves are collectively referred to as atrioventricular valves because they are located between the atria and the ventricles of the heart. The primary function of these valves is to regulate blood flow from the atria to the ventricles, ensuring that blood moves in the correct direction and preventing backflow. The tricuspid valve is situated between the right atrium and right ventricle, while the mitral valve is found between the left atrium and left ventricle. Understanding this terminology is important in cardiovascular anatomy and physiology, as it highlights the role of these valves in the overall function of the heart. The other options do not accurately describe the relationship or function of the tricuspid and mitral valves. Semilunar valves refer to the valves located at the exits of the ventricles, specifically the aortic and pulmonary valves. Chordae tendineae are the fibrous cords that connect the atrioventricular valves to the papillary muscles, playing a supportive role rather than being a type of valve. Valvular insufficiency refers to a condition where a valve does not close properly, leading to backward flow, which is a pathology rather than a classification of valves.