CCT Cardiovascular Anatomy and Physiology 2

Question 1

Which layer of the heart wall is responsible for the contractile function of the heart?

Accepted Answer

Myocardium

Answer

The myocardium is the middle muscular layer of the heart wall composed of cardiac muscle cells (cardiomyocytes) that are responsible for generating the force needed to pump blood.

Question 2

What is the primary function of the tricuspid valve?

Accepted Answer

Prevent backflow of blood from the right ventricle into the right atrium during systole

Answer

The tricuspid valve is located between the right atrium and right ventricle. It opens during diastole to allow blood to flow into the right ventricle and closes during systole to prevent backflow.

Question 3

The sinoatrial (SA) node is located in which cardiac structure?

Accepted Answer

Right atrium, near the superior vena cava junction

Answer

The SA node is located in the posterior wall of the right atrium, near the junction with the superior vena cava, at the sulcus terminalis.

Question 4

Which coronary artery primarily supplies the left ventricle's anterior wall and interventricular septum?

Accepted Answer

Left anterior descending (LAD) artery

Answer

The left anterior descending artery travels in the anterior interventricular groove and is the primary blood supply to the anterior wall of the left ventricle and the anterior two-thirds of the interventricular septum.

Question 5

During the cardiac cycle, what occurs during ventricular diastole?

Accepted Answer

The ventricles relax and fill with blood from the atria

Answer

Diastole is the relaxation phase of the cardiac cycle. During ventricular diastole, the myocardium relaxes, ventricular pressure falls, the AV valves open, and the ventricles fill with blood.

CCT - Certified Cardiographic Technician Exam Practice Test

CCT - Certified Cardiographic Technician Exam Practice Test

CCT Cardiovascular Anatomy and Physiology 2