#1
Which chamber of the heart receives oxygenated blood from the lungs?
Right atrium
Left atrium
Right ventricle
Left ventricle
#2
What is the average heart rate for a resting adult?
60-70 beats per minute
80-90 beats per minute
100-110 beats per minute
120-130 beats per minute
#3
Which heart chamber has the thickest muscular wall?
Right atrium
Left atrium
Right ventricle
Left ventricle
#4
What is the function of the papillary muscles in the heart?
Contract and pump blood
Control heart rate
Anchor and stabilize the atrioventricular valves
Generate electrical impulses
#5
What is the term for the volume of blood pumped out by each ventricle per minute?
Cardiac output
Stroke volume
Heart rate
Pulse pressure
#6
What is the main function of the heart valves?
Pump blood to the body
Prevent backflow of blood
Exchange gases with the lungs
Regulate body temperature
#7
Which vessel carries oxygenated blood from the heart to the rest of the body?
Pulmonary artery
Pulmonary vein
Aorta
Superior vena cava
#8
Which coronary artery is often referred to as the 'widowmaker'?
Left anterior descending (LAD) artery
Right coronary artery (RCA)
Circumflex artery
Left circumflex artery (LCx)
#9
What is the primary function of the pericardium?
Generate electrical impulses
Regulate blood pressure
Protect and lubricate the heart
Facilitate gas exchange
#10
What is the medical term for a heart attack?
Arrhythmia
Angina pectoris
Myocardial infarction
Aneurysm
#11
What is the term for the contraction phase of the heart's pumping action?
Diastole
Systole
Cardiac cycle
Atrial contraction
#12
Which part of the heart's conduction system initiates the heartbeat?
SA node (sinoatrial node)
AV node (atrioventricular node)
Purkinje fibers
Bundle of His
#13
Which blood vessels supply the heart muscle with oxygen and nutrients?
Veins
Arteries
Capillaries
Venules
#14
In which phase of the cardiac cycle does the heart relax and fill with blood?
Systole
Diastole
Atrial contraction
Ventricular contraction
#15
What is the function of the chordae tendineae in the heart?
Conduct electrical impulses
Regulate blood flow
Prevent valve prolapse
Contract the ventricles