CCT Cardiovascular Anatomy and Physiology 3

Question 1

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

Accepted Answer

Top of the interventricular septum, just below the membranous septum

Answer

After passing through the AV node, the impulse travels through the bundle of His, which divides into the right and left bundle branches at the upper muscular portion of the interventricular septum.

Question 2

Which chambers of the heart are separated by the interatrial septum?

Accepted Answer

Right atrium and left atrium

Answer

The interatrial septum is the wall that separates the two atria. It contains the fossa ovalis, a remnant of the foramen ovale from fetal circulation.

Question 3

What is the Frank-Starling law of the heart?

Accepted Answer

The strength of ventricular contraction increases as preload (end-diastolic volume) increases, up to a physiologic limit

Answer

The Frank-Starling law states that within physiologic limits, the heart contracts more forcefully when it is filled with more blood — greater stretch of the myocardial fibers results in stronger contraction.

Question 4

Which valve separates the left atrium from the left ventricle?

Accepted Answer

Mitral (bicuspid) valve

Answer

The mitral valve (also called the bicuspid valve because it has two leaflets) is located between the left atrium and left ventricle, controlling blood flow during the cardiac cycle.

Question 5

Blood returning from the lungs enters the heart through which structure?

Accepted Answer

Pulmonary veins into the left atrium

Answer

Oxygenated blood from the lungs returns to the heart via four pulmonary veins that drain into the left atrium, completing the pulmonary circulation circuit.

CCT - Certified Cardiographic Technician Exam Practice Test

CCT - Certified Cardiographic Technician Exam Practice Test

CCT Cardiovascular Anatomy and Physiology 3