AP
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Hemorrhage results in an increased heart rate through the: | baroreceptor reflex
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| The second heart sound occurs as a result of valve closure due to: | ventricular relaxation
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| The term __________ refers to a heart valve which is stiffened and narrowed. | stenosis
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| The vagus has effects on: | The SA and AV nodes only
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| In a healthy heart an increase in myocardial stretch will result in __________ force of ventricular contraction. | increased
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| The fastest autorhythmicity in the heart is located in the: | SA node
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| An increase in the threshold of the hearts myogenic cells will: | decrease the rate of autorhythmicity
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| The absence of a P wave in the ECG indicates damage in: | The atrial muscle or SA node
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| There are ____ syncytia in the heart. | Two, the atrial muscle and the ventricular muscle
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| Most ventricular filling occurs during: | Quiescent period
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| As a result of exercise the cardiac center receives input from the: | The hypothalamus
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| The principal cause of increased EDV is: | increased venous return
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| The .1 second delay inherent in the conduction pathway occurs in the: | AV node
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| Which valve closes to produce the first heart sound. | Both AV valves
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| The _____ fill with blood and prevent backflow into the atria when the right ventricle contracts. | tricuspid valve
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| The _____ is an ear-like flap whose cavity is continuous with that of the atrium | auricle
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| The specialized muscles which line the ventricles and carry the Purkinje fibers to the ventricular myocardium are called: | trabeculae
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| The coronary arteries arise from an area __________. | Located behind the aortic semilunar valves.
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