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Action potentials arriving at the sinoatrial and atrioventricular nodes of the heart cause ________

to be released.

User Jamiey
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Action potentials arriving at the sinoatrial and atrioventricular

nodes of the heart cause the release of neurotransmitter

User Dcharles
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Answer:

Action potentials arriving at the sinoatrial and atrioventricular nodes of the heart cause acetylcholine to be released

Step-by-step explanation:

User Sunder R
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