What would be the effect of a reduced venous return?Multiple ChoiceReduced blood flow to critical organs, leading to cell deathReduced heart rate and, without compensation, reduced blood pressureReduced end-diastolic volume and, without compensation, reduced cardiac outputReduced peripheral resistance and, without compensation, reduced end-diastolic volume
Question
What would be the effect of a reduced venous return?Multiple ChoiceReduced blood flow to critical organs, leading to cell deathReduced heart rate and, without compensation, reduced blood pressureReduced end-diastolic volume and, without compensation, reduced cardiac outputReduced peripheral resistance and, without compensation, reduced end-diastolic volume
Solution
The effect of a reduced venous return would be a reduced end-diastolic volume and, without compensation, reduced cardiac output.
Here's why: Venous return is the amount of blood that is returned to the heart by the veins. This blood then fills the ventricles during diastole, which is known as the end-diastolic volume. If venous return decreases, the end-diastolic volume would also decrease. According to the Frank-Starling law of the heart, the stroke volume of the heart increases as the end-diastolic volume (or preload) increases. Therefore, if the end-diastolic volume decreases due to reduced venous return, the cardiac output (which is the product of heart rate and stroke volume) would also decrease, assuming there's no compensatory mechanism in place.
Similar Questions
In which situation would the stroke volume be the greatest?Group of answer choiceswhen venous return is increased.when the force of contraction is decreased.when the difference between the end-diastolic volume and the end-systolic volume is small.when venous return is decreased.
What factors contribute to venous return to the heart?Multiple select question.smooth muscle contraction in the walls of arteriesskeletal muscle contractionsvein vasoconstrictionpressure changes during breathing
An increase in venous return _______.Question 8Select one:A.results in decreased preloadB.occurs with severe blood lossC.decreases EDVD.occurs during exercise
An increase in venous return will _______.Question 12Select one:A.increase the contractility of the heartB.increase EDVC.increase stroke volumeD.increase EDV, increase stroke volume and increase the contractility of the heart
Which of the following factors would NOT increase cardiac output? Question 3Select one:a.increased venous returnb.decreased parasympathetic stimulation of the heart. c.increased sympathetic stimulation of the heartd.increased blood concentration of glucosee.stimulation of the heart by epinephrine
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