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Question 15 3 / 3 points One of the most important ways of investigating the function of the heart is called the "cardiac output. Which of the following facts is/are true? » Cardiac output, CO, is determined by multiplying the heart rate, HR, by the amount of blood that is pumped out of the left ventricle with each heart contraction, called "stroke volume" and designated as SV. Is almost impossible to measure. It cannot be measured without using very dangerous and invasive methods. The CO will never change in any one individual. All of the above are true. W Hide question 15 feedback Good work; your answer is correct! Question 16 3 / 3 points Which of the following parts of an ECG represents the depolarization of the atria? The QRS-complex The T-wave The PR-interval o The P-wave The ST interval W Hide question 16 feedback y o S D Sy S ¥ |