★ Regulation of Heart Rate Quiz
what is the function of the bundle of HIS
A. coducts the waves of electrical activity between the ventricles to the apex
B. regulates heart rate
C. carries electrical waves to the muscular wall
Select your answer:
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What is the function of a valve?
A. Helps blood to clot
B. Keeps blood flowing in all directions
C. Keeps blood flowing in one direction
D. Stops blood from flowing