Answer:
B- Are constantly replacing themselves,
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Alcoholism is a difficult disease, which includes both a psychological and physical dependence. It cannot be fixed overnight, even if a woman is pregnant. You should be a cheerleader for her and encourage her to talk to her doctor. You should also have a support system of your own, and talk on the phone with loved one when you need to, while respecting her privacy as well. </span>
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.
