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Question 6Needs GradingMaintenance of systemic blood pressure is primarily dependent on venous return. 1) Define venous return and explain what purpose it serves; 2) What happens if venous return decreases? 3)4)5) Name and describe the three mechanisms that maintain venous return when the body is vertical.Selected Answer:Response Feedback:[None Given]Question 77 out of 8 pointsWhich of the following statements regarding the structure and function of blood vessels are true and which are false?Only veins and capillaries have valves, because BP is low within them.The smooth muscle layer of arteries is thicker than thatof veins.Capillaries are the continuation of the endothelium of arteries, and become the endothelium of veins.A. TrueA. TrueBlood flow into capillary networks is regulated by B. B.
precapillary sphincters and their sympathetic nerves.Sinusoids are located where capillaries need strong walls to prevent leaks.An anastomosis is a connection between vessels of thesame type that provides an alternate pathway for blood flow.Exchanges of materials between the blood and tissues take place in capillary networks.A. TrueA. True