A. Pacemaker cells located in the atria fire before the pacemaker cells in the ventricles. B. It takes time for hormones to diffuse from the atria to the ventricles to trigger contraction. C.The electrical signal generated in the right atrium is delayed at the AV node before passing to the ventricles. D.The ventricular muscle cells contract more slowly than the atrial muscle cells.
True OTC is the most widely misused medication.
Answer:
A normal heart beats at 60-100 beats per minute, however, the fastest it can go is 300 per minute.
Explanation:
