Question

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

to be released.

Answer 1

Action potentials arriving at the sinoatrial and atrioventricular

nodes of the heart cause the release of neurotransmitter

Answer 2

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

Step-by-step explanation: