Select the correct statement about cardiac output. (a) decreased venous return will result in increased end diastolic volume.(b) stroke volume increases if end diastolic volume decreases. (c) if a semilunar valve were partially obstructed, the end systolic volume in the affected ventricle would be decreased. (d) a slow heart rate increases end diastolic volume, stroke volume, and force of contraction.

The correct answer is option D.

Explanation:

The cardiac output is the blood amount that heart pumps in a minute. In other words, the amount of blood pump by the left ventricle of the heart in a 1 contraction is termed as the stroke volume. The stroke volume and the heart rate determine the cardiac output. Slow heart rate increases the end-diastolic volume, stroke volume, and force of contraction.

Thus, the correct answer is option d.

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