The introduction of ________ initiates contraction during the plateau phase

Treatment of immune deficiencies through the use of replacement therapies includes all of the following, EXCEPT:

A) gene therapy. B) transplantation. C) psychoneuroimmunologic regulation. D) gamma globulin therapy.

What is the cardiac rhythm depicted on the following electrocardiogram?

a. Atrial fibrillation c. Paroxysmal atrial tachycardia b. Premature atrial beats d. Premature ventricu-lar contractions