Question

multiple choice question
an increase in venous return to the heart leads to a(n) ____ in preload and therefore a(n) ____ in stroke volume

increase, decrease
decrease, increase
decrease, decrease
increase, increase

Explanation:

Pre - load is the degree to which the ventricles are stretched prior to contraction. An increase in venous return means more blood is coming back to the heart, stretching the ventricular muscle more (increasing pre - load). According to the Frank - Starling law of the heart, within physiological limits, an increase in pre - load leads to an increase in stroke volume as the heart contracts more forcefully.

Answer:

D. increase, increase