#1
Which chamber of the heart receives oxygenated blood from the lungs?
Left atrium
ExplanationReceives oxygenated blood from the lungs.
#2
What is the average heart rate for a resting adult?
60-70 beats per minute
ExplanationAverage resting heart rate.
#3
Which heart chamber has the thickest muscular wall?
Left ventricle
ExplanationHas the thickest muscular wall.
#4
What is the function of the papillary muscles in the heart?
Anchor and stabilize the atrioventricular valves
ExplanationAnchor and stabilize AV valves.
#5
What is the term for the volume of blood pumped out by each ventricle per minute?
Cardiac output
ExplanationVolume of blood pumped by each ventricle per minute.
#6
What is the main function of the heart valves?
Prevent backflow of blood
ExplanationPrevent backflow of blood.
#7
Which vessel carries oxygenated blood from the heart to the rest of the body?
Aorta
ExplanationCarries oxygenated blood to the body.
#8
Which coronary artery is often referred to as the 'widowmaker'?
Left anterior descending (LAD) artery
ExplanationReferred to as the 'widowmaker' artery.
#9
What is the primary function of the pericardium?
Protect and lubricate the heart
ExplanationProtects and lubricates the heart.
#10
What is the medical term for a heart attack?
Myocardial infarction
ExplanationMedical term for a heart attack.
#11
What is the term for the contraction phase of the heart's pumping action?
Systole
ExplanationContraction phase of heart's pumping.
#12
Which part of the heart's conduction system initiates the heartbeat?
SA node (sinoatrial node)
ExplanationInitiates the heartbeat.
#13
Which blood vessels supply the heart muscle with oxygen and nutrients?
Arteries
ExplanationSupply oxygen and nutrients to the heart.
#14
In which phase of the cardiac cycle does the heart relax and fill with blood?
Diastole
ExplanationHeart relaxes and fills with blood.
#15
What is the function of the chordae tendineae in the heart?
Prevent valve prolapse
ExplanationPrevent valve prolapse.