A nurse is teaching a class on the cardiovascular system to nurses from the unit. The nurse asks the class what factors largely determine stroke volume. Which response from a member of the class demonstrates a need for further teaching?
a. Myocardial contractility
b. Viscosity of the blood
c. Cardiac afterload
d. Cardiac preload
B
Viscosity of the blood affects resistance to flow; this response indicates that further teaching is required.
Stroke volume is determined largely by three factors: myocardial contractility, cardiac afterload, and cardiac preload; no further teaching is required with these answers.
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