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18 Cards in this Set
- Front
- Back
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The visceral layer of the serous pericardium: (a) is fused to the fibrous pericardium (b) is the fluid that offers protection to the heart (c) is a tough, in elastic layer that anchors the heart in the mediastinum (d) is also called the pericardial cavity (e) is the outer layer of the heart |
is the outer layer of the heart |
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The thickest wall in the heart due to its increased work load is the: a. left atrium b. right ventricle c. interventricular septum d.left ventricle e. right atrium |
left ventricle |
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The term used to describe a backflow of blood from the left ventricle into the left atrium is: a. aortic stenosis b. mitral valve prolapse c. semilunar valve prolapse d. mitral valve stenosis e. aortic insufficiency |
mitral valve prolapse |
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What is the correct pathway of blood starting at the right atrium? |
right atrium, right ventricle, pulmonary trunk, pulmonary veins, left atrium, left ventricle, aorta |
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Which wave is matched correctly with the heart’s activity? a. QRS complex – atrial repolarization b. P wave – ventricular repolarization c. T wave – ventricular depolarization d. S-T segment – the ventricles are depolarized |
S-T segment – the ventricles are depolarized |
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The amount of blood ejected from either ventricle every minute is called: a. stroke volume b. end-diastolic volume c. afterload d.cardiac output e. heart rate |
Cardiac output |
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The Frank-Starling law of the heart states: |
the more the heart is stretched pre-contraction the stronger the force of contraction |
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The first functional organ to develop in the embryo is the: |
the heart |
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Heart tissue develops from ectoderm. a. ) true b.) false |
FALSE |
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Which of the following statements is NOT correct? a.) The walls of the ventricles are thicker because the ventricles pump blood under higher pressure over greater distances. b.) The walls of the atria are thicker because the atria receive blood under pressure. c.) The wall of the right ventricle is thinner than that of the left ventricle because the right side of the heart pumps blood a shorter distance at lower pressure. d.) Although the right side of the heart has a smaller workload, the right and left ventricle simultaneously eject the same amount of blood. e.) All of these choices are correct. |
The walls of the atria are thicker because the atria receive blood under pressure. |
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What is the correct flow of excitation through the cardiac conduction system? |
SA node, AV node, bundle of His, right and left bundle branches, Purkinje fibers |
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When compared to the autorhythmic fibers, contractile cardiac myocytes |
have a resting membrane potential of about -90mV. |
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Contractility can be decreased by |
decreasing inflow of calcium ions. |
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The raised ridges of cardiac muscle found in the ventricles are called the: |
trabeculae carneae |
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When comparing cardiac muscle tissue to skeletal muscle tissue, which statement is true? |
both types of fibers are striated |
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An electrocardiogram can help determine all of the following except: a.) a cause of chest pain b.) if a heart attack has occurred c.) if the heart has enlarged d.) if the conduction pathway is functioning normally e.) all of these choices can be determined during an ECG |
all of these choices can be determined during an ECG |
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What is occurring during isovolumetric contraction? |
all four valves are closed |
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Prolapse of the atrioventricular valves is prevented by |
contraction of the papillary muscles. |
