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Action potentials received directly from ________________ stimulate the papillary muscles to contract allowing for the proper _______________ of the AV valves.

Action potentials received directly from ________________ stimulate the papillary muscles to contract allowing for the proper _______________ of the AV valves.
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Action potentials received directly from ________________ stimulate the papillary muscles to contract allowing for the proper _______________ of the AV valves.

User Chris Yim
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Atrioventricular node; closing
User Kate Melnykova
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