Which of the following factors determines stroke volume?
a. size of the heart and size of the heart valves
b. age of the person and the condition of the heart
c. preload, afterload, and contractility
d. blood pressure and hormonal influences
C
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A Incorrect. The size of the heart and size of the heart valves are not factors in determining stroke volume.
B Incorrect. The age of the person and the condition of the heart are not factors in determining stroke volume.
C Correct. The determinants of stroke volume are preload, afterload, and contractility.
D Incorrect. Blood pressure and hormonal influences are not factors in determining stroke volume.
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