62) Select the correct statement about cardiac output. A) Stroke volume increase
ID: 3479698 • Letter: 6
Question
62) Select the correct statement about cardiac output. A) Stroke volume increases if end diastolic volume decreases. B) A slow heart rate increases end diastolic volume, stroke volume, and force of contraction. C) Decreased venous return will result in increased end diastolic volume. D) If a semilunar valve were partially obstructed, the end systolic volume in the affected ventricle would be 63) Which of the following statements is false or A) Cardiac muscle fibers depend mostly on anaerobic decreased. incorrect? cellular respiration to generate ATP B) Under normal resting conditions, cardiac muscle tissue contracts and relaxes about 75 times per minute. C) Cardiac muscle fibers can use lactic acid to make ATP D) Cardiac muscle contracts when stimulated by its own 64) Isovolumetric contraction B) refers to the short period during ventricular systole C) occurs while the AV valves are open valves close autorhythmic muscle cells. A) occurs only in people with heart valve defects when the ventricles are completely closed chambers D) occurs immediately after the aortic and pulmonary TRUE/FALSE. Write T if the statement is true and F' if the statement is false 65) The thick-walled arteries close to the heart are called muscular arteries. 66) The biceps brachii inserts on the radius. 67) A precapillary sphincter is a cuff of smooth muscle that regulates the flow of blood into the capillaries. 68) The left side of the heart pumps the same volume of blood as the right.Explanation / Answer
Question 62-
The fourth option is wrong for the cardiac output. If semilunar valve is obstructed the blood will enter lesser than normally. It is due to lesser carrying of blood into lungs or vena cava. Other options are reversed from the truth. Therefore, 4th option is the right choice for the question.
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