Cardiac Anatomy & Physiology Flashcards
7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Cardiac Anatomy & Physiology flashcards as text
Which layer of the heart wall contains the cardiac muscle cells responsible for contraction?
Answer: Myocardium
The myocardium is the thick middle layer composed of cardiac muscle cells that generate the force of contraction.
The mitral valve separates which two cardiac chambers?
Answer: Left atrium and left ventricle
The mitral (bicuspid) valve is the atrioventricular valve located between the left atrium and left ventricle.
What is the primary pacemaker of the heart under normal conditions?
Answer: SA node
The sinoatrial (SA) node in the right atrium initiates the electrical impulse at a rate of 60–100 bpm under normal conditions.
Which coronary artery primarily supplies the left ventricle's lateral wall?
Answer: Left circumflex artery
The left circumflex artery branches from the left main coronary artery and supplies the lateral wall of the left ventricle.
The QRS complex on an ECG corresponds to which cardiac event?
Answer: Ventricular depolarization
The QRS complex represents the electrical depolarization of the ventricular myocardium, triggering ventricular contraction.
Which structure prevents backflow of blood from the aorta into the left ventricle?
Answer: Aortic valve
The aortic semilunar valve closes during ventricular relaxation to prevent blood from returning from the aorta to the left ventricle.
What term describes the period during which the ventricles are filling with blood?
Answer: Diastole
Diastole is the relaxation phase of the cardiac cycle when the ventricles fill with blood from the atria.