Question

multiple choice question
when venous return to the heart decreases, it leads to a(n) ____ in preload, and therefore, a(n) ____ in stroke volume.

o increase, increase
o decrease, increase
o decrease, decrease
o increase, decrease

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Explanation:

Pre - load is the degree of stretch of the cardiac muscle fibers at the end of diastole, and is related to venous return. When venous return decreases, pre - load decreases. Stroke volume is the volume of blood ejected by the heart in one contraction, and is directly related to pre - load. A decrease in pre - load leads to a decrease in stroke volume according to the Frank - Starling law.

Answer:

C. decrease, decrease