anatomy 2 quiz 1 exam 2

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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


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