anatomy 2 quiz 1 exam 2
which one of the following represents the correct path for the transmission of an impulse in the intrinsic conduction system of the hear
E) sinoatrial (SA) node, atrioventricular (AV) node, atrioventricular (AV) bundle, right and left bundle branches, Purkinje fibers
the tiny white cords that anchor the cusps or flaps of valves to the walls of the ventricles are called the _________
chordae tendinea
when ventricles _____, the AV valves close
contract
recording of the heart's electrical activity if referred to as
electrocardiogram, ECG. AKG
the visceral layer of the pericardium is actually the same layer as the
epicardium
T OR F? An increased firing of the parasympathetic nervous system causes increased cardiac output
false
T OR F? during ventricular diastole, the bicuspid and tricuspid valves are closed
false
T OR F? the atrioventricular node starts each heart beat and is often called the pacemaker of the heart for that reason
false
T OR F? the chordae tendineae anchor the semilunar valves to the walls of the ventricle
false
T OR F? the interatrial septum divides the two atria transversely.
false
T OR F? the semilunar valves prevent the backflow of blood into the atria when the ventricles are contracting
false
the flaplike opening between the atria of the fetus through which blood is shunted becomes _______ in adults
foramen ovale
which of these events is NOT associated with ventricular systole
heart is relaxed
the hormones epinephrine and thyroxine will cause the heart rate to
increase
what structure divides the left from the right ventricle
interventricular septum
the pulmonary veins are attached to what chamber
left atrium
the pointed apex of the heart is oriented toward the
left hip
the aorta is attached to which chamber
left ventricle
when the ventricles contract, the bicuspid (mitral) valve prevents blood from flowing from the
left ventricle to the left atrium
pulmonary circulation involves blood flow to and from the heart and the
lungs
the bicuspid valve is also referred to as the __________ valve
mitral
The circulation from the heart to the lungs and back is known as __________ circulation.
pulmonary
blood leaves the right ventricle through the
pulmonary trunk
brings oxygenated blood to the heart
pulmonary vein
receives deoxygenated blood from the heart
pulmonary vein
which one of the following blood vessels carries oxygenated blood
pulmonary vein
the left atrium receives blood from the lungs via vessels identified as
pulmonary veins
when the ventricles _____, the semilunar valves are closed
relax
the inferior vena cava is attached to which chamber
right atrium
the sinoatrial node is located in the
right atrium
the superior vena cava is attached to which chamber
right atrium
the tricuspid valve is located between the
right atrium and right ventricle
the pulmonary trunk is attached to which chamber
right ventricle
deoxygenated blood is returned to the right side of the heart by the
superior and inferior vena cava
the term that means heart contraction is
systole
the right AV valve is known as the
tricuspid valve
T OR F? arteries carry oxygenated blood and veins carry deoxygenated blood
true
T OR F? the alternate name for the bicuspid valve is the mitral valve.
true
T OR F? the parietal pericardium is superficial to the visceral pericardium surrounding the heart
true
T OR F? the part of the conduction system of the heart that directly supplies the walls of the ventricles is the Purkinje fibers
true
brings deoxygenated blood to the heart
vena cava
the two discharging chambers of the heart are known as the
ventricles
the two inferior chambers of the heart are known as the
ventricles
receives oxygenated blood from the heart
aorta
the largest artery in the body is the
aorta
which valve guards the base of the aorta and opens when the ventricles are contracting
aortic semilunar valve
the two receiving chambers of the heart are known as the
atria
the two superior chambers of the heart are known as the
atria
the valves located between the atria and ventricles are known as the __________ valves
atrioventricular
the average cardiac cycle is about
0.8 seconds
the first sound "lub" is caused by the closure of the ______ valves
AV or atrioventricular
the natural pacemaker of the heart, located in the right atrium of the heart, is often called the
SA or sinoatrial node
