#1
Which chamber of the heart receives deoxygenated blood from the body?
Right atrium
ExplanationDeoxygenated blood enters the heart through the right atrium.
#2
What is the medical term for the 'heart attack'?
Myocardial infarction
ExplanationMyocardial infarction refers to the death of heart muscle tissue due to lack of oxygenated blood.
#3
Which valve prevents the backflow of blood from the right ventricle into the right atrium?
Tricuspid valve
ExplanationThe tricuspid valve prevents backflow of blood from the right ventricle into the right atrium.
#4
What is the term for the network of specialized cells responsible for conducting electrical impulses through the heart?
Purkinje fibers
ExplanationPurkinje fibers conduct electrical impulses, coordinating the heart's contractions.
#5
Which blood vessels carry oxygenated blood away from the heart?
Arteries
ExplanationArteries carry oxygenated blood from the heart to various parts of the body.
#6
What is the function of the sinoatrial (SA) node in the heart?
Initiates the heartbeat
ExplanationThe SA node initiates electrical impulses, setting the pace for the heartbeat.
#7
Which structure separates the left and right sides of the heart, preventing the mixing of oxygenated and deoxygenated blood?
Septum
ExplanationThe septum separates the left and right sides of the heart, maintaining blood separation.
#8
What is the term for the relaxation phase of the cardiac cycle?
Diastole
ExplanationDiastole is the phase when the heart muscle relaxes, allowing chambers to fill with blood.
#9
What is the term for the outer layer of the heart wall?
Epicardium
ExplanationThe epicardium is the outermost layer of the heart wall.
#10
Which artery supplies oxygen-rich blood to the tissues of the heart itself?
Coronary artery
ExplanationCoronary arteries supply oxygenated blood to the heart muscle.
#11
Which coronary artery supplies blood to the posterior aspect of the left ventricle and the interventricular septum?
Circumflex artery
ExplanationThe circumflex artery supplies blood to the posterior left ventricle and interventricular septum.
#12
What is the term for the force exerted by circulating blood against the walls of blood vessels?
Blood pressure
ExplanationBlood pressure is the force exerted by blood against blood vessel walls.