The ability of the heart to generate its own Impulse is known as what?. A.Repetitive. B. Automaticity. C. Contratility. D.Excitability. correct answer B. 2.The stroke volume of the heart has decreased,the cardiac output can stabilize if only A.the heart rate increases. B.The blood volume goes fast. C.heart rate decrease. D.Blood pressure decreases and later increases. …