CMT Cardiac Anatomy and Physiology 2

Question 1

Which layer of the heart wall contains the cardiac muscle cells responsible for contraction?

Accepted Answer

Myocardium

Answer

The myocardium is the thick middle layer of the heart wall composed of cardiac muscle cells that generate the force of contraction.

Question 2

The mitral valve is located between which two cardiac chambers?

Accepted Answer

Left atrium and left ventricle

Answer

The mitral (bicuspid) valve is the atrioventricular valve on the left side of the heart, separating the left atrium from the left ventricle.

Question 3

What is the primary function of the chordae tendineae?

Accepted Answer

Prevent AV valve leaflets from prolapsing into the atria

Answer

Chordae tendineae are fibrous cords that anchor the AV valve leaflets to papillary muscles, preventing them from inverting into the atria during ventricular contraction.

Question 4

Which coronary artery supplies the lateral wall of the left ventricle?

Accepted Answer

Left circumflex artery

Answer

The left circumflex artery branches from the left main coronary artery and supplies the lateral and posterior walls of the left ventricle.

Question 5

During diastole, which event occurs in the cardiac cycle?

Accepted Answer

Ventricular relaxation and filling with blood

Answer

Diastole is the phase of cardiac relaxation during which the ventricles refill with blood from the atria through open AV valves.

(CMT) Certified Cardiac Monitor Technician Practice Test

(CMT) Certified Cardiac Monitor Technician Practice Test

CMT Cardiac Anatomy and Physiology 2