An increase in afterload and venous compliance can cause stroke volume to change from the point marked X to point:
Correct Answer: E
Description: Starling curve above the one on which the X is marked will result from an increase in contractility or a decrease in afterload.
The Starling curve below the one on which the X is marked will result from a decrease in contractility or an increase in afterload.
A mild hemorrhage, which causes a decrease in blood volume and pressure, will evoke the baroreceptor reflex, which produces an increase in contractility. The low blood volume decreases the end-diastolic volume. Therefore, the stroke volume will be at the point marked A.
An increase in afterload indicates that the new stroke volume will be on the lower curve. The increase in venous compliance results in a decrease in end-diastolic volume, and, therefore, the stroke volume will be at the point-marked E.
Category:
Physiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now