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16 Cards in this Set
- Front
- Back
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Which heart chamber sends deoxygenated blood to the lungs?
right ventricle left ventricle left atrium right atrium |
right ventricle
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Which valve is located between the right atrium and ventricle?
mitral valve tricuspid valve pulmonary semilunar valve aortic semilunar valve |
tricuspid valve
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What valve separates the right atrium and the right ventricle?
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The right atrioventricular valve (or right AV valve), also called the tricuspid valve, (for its three leaflet lobes) separates the right atrium and right ventricle.
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What structures connect the individual heart muscle cells?
anastomoses intercalated discs trabaculae carneae chordae tendinae |
intercalated discs
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Which of the following terms refers to a lack of oxygen supply to heart muscle cells?
embolism functional syncytium infarction ischemia |
ischemia
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Which of the following structures sets the pace of heart contraction?
SA node atrioventricular bundle AV node bundle branches |
SA node
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What does the T wave of the electrocardiogram represent?
ventricular repolarization atrial depolarizaton atrial repolarization ventricular depolarization |
ventricular repolarization
Repolarization (or recovery) of the ventricles. |
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Which of the following is NOT a factor that regulates stroke volume?
contractility afterload preload heart rate all the factors above regulate stroke volume |
all the factors above regulate stroke volume
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Cardiac output is a function of
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heart rate and stroke volume.
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What factors affect stroke volume?
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Venous return controls EDV (end diastolic volume) and thus stroke volume and cardiac output.
Venous return is dependent on: - blood volume and venous pressure - vasoconstriction caused by the sympathetic nervous system - skeletal muscle pumps - pressure drop during inhalation |
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What is afterload?
back pressure exerted by arterial blood cardiac reserve degree of stretch of the heart muscle contractility of cardiac muscle |
back pressure exerted by arterial blood
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What is afterload?
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In cardiac physiology, afterload is used to measure the tension produced by a chamber of the heart in order to contract.
Afterload can be thought of as the "load" that the heart must eject blood against. In simple terms, the afterload is closely related to the aortic pressure. |
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What is the difference between cardiac preload and afterload?
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Cardiac preload is the amount of stretch the heart undergoes before a contraction. Afterload is the amount of pressure contracting ventricles must produce to force open the semilunar valves.
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What causes heart sounds?
pressure of blood in the ventricles blood flowing from the atria into the ventricles heart valve closure opening of heart valves |
heart valve closure
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What causes heart sounds?
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Heart sounds are created primarily from turbulence in blood flow created by the closures of the valves.
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What is the source of ATP for cardiac muscle contraction?
creatine phosphate cellular respiration glycolysis stored ATP |
Cellular respiration
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