The layers of the heart wall from superficial to deep are:
epicardium, endocardium, and myocardium.
myocardium, endocardium, and epicardium.
endocardium, myocardium, and epicardium.
epicardium, myocardium, and endocardium.
epicardium, myocardium, and endocardium, pg. 663
Which of the following is not a difference between the left and right ventricles?
The left ventricle is a more powerful pump than the right ventricle.
The left ventricle receives a smaller percentage of coronary blood supply than the right ventricle.
The walls of the left ventricle are thicker than the walls of the right ventricle.
The left ventricle pumps blood to the systemic circuit, while the right ventricle pumps blood to the pulmonary circuit
The left ventricle receives a smaller percentage of coronary blood supply than the right ventricle., pg. 668
Blood within the pulmonary veins returns to the ________.
right atrium
right ventricle
left atrium
left ventricle
left atrium, pg. 664
The term for pain associated with deficient blood delivery to the heart that may be caused by the transient spasm of coronary arteries is ________.
ischemia
angina pectoris
myocardial infarct
pericarditis
angina pectoris, pg. 670
The role of the coronary arteries is to:
supply blood to the heart tissue.
direct blood to the pulmonary veins.
move blood from the atria to the ventricles.
direct blood to the aorta.
supply blood to the heart tissue, pg 668
Small muscle masses attached to the chordae tendineae are the ________.
trabeculae carneae
papillary muscles
pectinate muscles
venae cavae
papillary muscles, pg. 662 & 665
The order of impulse conduction in the heart, from beginning to end, is:
SA node, bundle branches, bundle of His, AV node, and Purkinje fibers.
SA node, bundle of His, AV node, bundle branches, and Purkinje fibers.
SA node, AV node, bundle of His, bundle branches, and Purkinje fibers.
SA node, bundle branches, AV node, bundle of His, and Purkinje fibers
SA node, AV node, bundle of His, bundle branches, and Purkinje fibers, pg 675
The P wave of a normal electrocardiogram indicates ________.
ventricular repolarization
atrial depolarization
atrial repolarization
ventricular depolarization
atrial depolarization, pg 677
The second heart sound is heard during which phase of the cardiac cycle?
ventricular ejection
isovolumetric contraction
isovolumetric relaxation
ventricular filling
isovolumetric relaxation, pg. 681
CO = ________ × SV
HR, pg. 681
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In what direction does blood flow through the heart?
from a region of high volume to a region of low volume
from a region of high oxygen content to a region of low oxygen content
from ventricles to atria
from a region of high pressure to a region of low pressure
from a region of high pressure to a region of low pressure
Atrial pressure is greater than ventricular pressure during which phase of the cardiac cycle?
ventricular ejection
isovolumetric contraction
atrial contraction
isovolumetric relaxation
atrial contraction
At what point during the cardiac cycle does the AV valve close?
when ventricular pressure becomes greater than atrial pressure
when the semilunar valve opens
when ventricular pressure becomes greater than aortic pressure
when aortic pressure becomes greater than ventricular pressure
when ventricular pressure becomes greater than atrial pressure
At what point in the cardiac cycle does the semilunar valve open?
when atrial pressure becomes greater than ventricular pressure
when ventricular pressure becomes greater than aortic pressure
when ventricular pressure becomes greater than atrial pressure
when the AV valve closes
when ventricular pressure becomes greater than aortic pressure
Ventricular pressure is greater than aortic pressure during which phase of the cardiac cycle?
ventricular filling
isovolumetric relaxation
ventricular ejection
isovolumetric contraction
ventricular ejection
At what point in the cardiac cycle does the semilunar valve close?
when pressure in the ventricle becomes less than aortic pressure
when ventricular pressure becomes greater than atrial pressure
when ventricular pressure becomes greater than aortic pressure
when atrial pressure becomes greater than ventricular pressure
when pressure in the ventricle becomes less than aortic pressure
Isovolumetric relaxation is characterized by which of the following?
Pressure in the atrium exceeds pressure in the ventricle.
Pressure in the ventricle exceeds pressure in the aorta.
The semilunar and AV valves are closed.
Blood flows backward through the heart from high to low pressure
The semilunar and AV valves are closed
At what point in the cardiac cycle does the AV valve open?
when atrial pressure becomes greater than ventricular pressure
when the semilunar valve closes
when ventricular pressure becomes greater than aortic pressure
when aortic pressure becomes greater than ventricular pressure
when atrial pressure becomes greater than ventricular pressure
What is the main function of heart valves?
to separate the atria and ventricles
to pump blood through the heart
to separate the left and right atria
to prevent backward flow of blood
...
When the atria contract, which of the following is true?
The AV valves are closed.
The atria are in diastole.
The semilunar valves are open.
The ventricles are in diastole
The ventricles are in diastole, pg.680
Which of the following is equivalent to the ventricular volume during isovolumetric contraction?
the end systolic volume (ESV)
The end diastolic volume (EDV)
the stroke volume (SV)
the minimum ventricular volume (MVV)
...
Which of the following is true during ventricular systole?
The AV valves are closed.
The atria are in systole.
The ventricles are empty.
The ventricles are relaxed
The AV valves are closed, pg. 681
During the ventricular ejection phase of the cardiac cycle, which of the following is true?
The AV valves are open.
The ventricles are in diastole.
The atria are in systole.
The semilunar valves are open
The semilunar valves are open, pg. 681
Most of the decrease in ventricular volume takes place during which phase of the cardiac cycle?
atrial contraction
ventricular filling
isovolumetric relaxation
ventricular ejection
ventricular ejection, pg. 681
Which of the following is equivalent to the ventricular volume during isovolumetric relaxation?
end systolic volume (ESV)
maximum ventricular volume (MVV)
stroke volume (SV)
end diastolic volume (EDV)
end systolic volume (ESV), pg. 681
Most of the increase in left ventricular volume takes place during what phase of the cardiac cycle?
atrial contraction
ventricular filling
isovolumetric relaxation
ventricular ejection
ventricular filling, pg. 680