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American Military University *

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181

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Mechanical Engineering

Date

Jan 9, 2024

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1

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Question 14 3 / 3 points Which of the following statement(s) is (are) true? The force the heart must overcome in order to pump blood is known as the its stroke volume. The term preload refers to a tension, or pressure, that the left ventricle must develop in order for the heart to function properly. The preload and afterload are the primary factors that cause the heart rate to change. o Contractility of the heart muscle refers to the force of contraction that this muscle can exert. Both C and D are true. ¥ Hide question 14 feedback Good work; your answer is correct! 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
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