CCI Cardiac Anatomy and Physiology 2

Question 1

The chordae tendineae attach the leaflets of the AV valves to which cardiac structures?

Accepted Answer

Papillary muscles

Answer

Chordae tendineae are fibrous cords that connect the AV valve leaflets to the papillary muscles, preventing leaflet prolapse during ventricular systole.

Question 2

Which layer of the heart wall contains the cardiac muscle cells (cardiomyocytes)?

Accepted Answer

Myocardium

Answer

The myocardium is the middle and thickest layer of the heart wall composed of cardiac muscle cells responsible for the pumping action.

Question 3

The coronary sinus drains primarily into which cardiac chamber?

Accepted Answer

Right atrium

Answer

The coronary sinus is the main venous drainage vessel of the heart and empties directly into the right atrium near the inferior vena cava.

Question 4

During isovolumetric contraction, which valves are CLOSED?

Accepted Answer

All four valves are closed

Answer

During isovolumetric contraction, ventricular pressure rises but no blood is ejected; all four valves remain closed until ventricular pressure exceeds great vessel pressure.

Question 5

The P-wave on a standard ECG corresponds to which mechanical event?

Accepted Answer

Atrial depolarization

Answer

The P-wave represents the electrical depolarization of the atria, which precedes and triggers atrial contraction.

CCI - Cardiovascular Credentialing International Practice Test

CCI - Cardiovascular Credentialing International Practice Test

CCI Cardiac Anatomy and Physiology 2