What is a chronotropic factor?
A) Anything that changes the heart rate
B) The cardiac accelerator center that uses sympathetic neurons to stimulate the SA and AV nodes to speed up the heart rate
C) The cardiac inhibitory center that uses parasympathetic neurons of the vagus nerve to keep the SA node at 70-80 beats/minute
D) All of the answers are correct.
Correct Answer:
Verified
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