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- The first heart sound represents
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Card 16 / 29: The first heart sound represents which portion of the cardiac cycle?
A)
atrial systole
B)
ventricular systole
C)
closing of the atrioventricular valves
D)
closing of the semilunar valves
Answer:
C) closing of the atrioventricular valves
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Attribution:
OpenStax College. Anatomy & Physiology, OpenStax-CNX Web site. http://cnx.org/content/col11496/1.6/, Jun 11, 2014
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