Heart sounds are caused by
A) semilunar valves
B) chordae tendineae
C) turbulence in the blood
D) contraction of the myocardium
Correct Answer:
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Q38: Oxygenated blood enters the left atrium through
Q39: The coronary sinus opens into the
A) right
Q40: The internal surface of the ventricles is
Q41: All of the following have the same
Q42: The first heart sound is heard just
Q44: About 70% of the blood that is
Q45: The sympathetic nervous system _ heart rate
Q46: The P wave on an electrocardiogram represents
Q47: Starling's law of the heart is a
Q48: The correct sequence for impulse transmission through
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