#1
Which chamber of the heart receives oxygen-rich blood from the lungs?
#2
What is the normal resting heart rate (beats per minute) in adults?
#3
What term describes the measurement of the electrical activity of the heart over a period of time, typically recorded as a graph?
#4
Which of the following is NOT a common symptom of heart failure?
#5
Which layer of the heart is responsible for the muscular contractions that pump blood?
#6
Which of the following ions is primarily responsible for the depolarization phase of the action potential in cardiac cells?
#7
What term refers to the delay in electrical conduction that occurs at the atrioventricular (AV) node in the heart?
#8
Which ECG wave represents ventricular depolarization?
#9
What is the term for the period of time during which the cardiac muscle is unresponsive to further stimulation, following depolarization?
#10
What term describes the process by which electrical impulses spread throughout the heart muscle, leading to its contraction?
#11
Which component of the cardiac conduction system initiates the electrical impulse that regulates the heart rate?
#12
Which coronary artery supplies blood to the left atrium and posterior walls of the left ventricle?
#13
Which of the following conditions is characterized by a rapid and irregular heart rate originating from the atria?
#14
What is the term for the condition in which the heart's electrical impulses are blocked or delayed as they move through the AV node?
#15