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Cardiovascular System: Blood Vessels and Layers

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Cardiovascular System: Blood Vessels and Layers

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Questions and Answers

Which layer of a blood vessel is primarily responsible for regulating vessel diameter and blood pressure?

Tunica Intima

Lumen

Tunica Media (correct)

Tunica Externa

What is the function of collagen fibers in the structure of blood vessels?

To facilitate the exchange of gases and nutrients

To regulate vessel diameter and blood pressure

To provide a smooth surface for blood flow

To provide strength and stability to blood vessel walls (correct)

Which blood vessels are responsible for carrying deoxygenated blood from the body back to the heart?

Arteries

Veins (correct)

Capillaries

Vasa Vasorum

What is the function of the Vasa Vasorum?

To supply blood to the walls of larger blood vessels Signup and view all the answers

Which layer of a blood vessel provides a smooth surface for blood flow?

Tunica Intima Signup and view all the answers

What is the process by which blood vessels narrow, reducing blood flow to a particular area or organ?

Vasoconstriction Signup and view all the answers

What is the primary responsibility of muscular arteries?

Distributing blood to various parts of the body Signup and view all the answers

Which type of capillary allows for the exchange of large molecules and whole blood cells?

Sinusoid Capillaries Signup and view all the answers

Where are fenestrated capillaries found in the human body?

Kidneys Signup and view all the answers

What is the function of precapillary sphincters?

Contract or relax to regulate blood flow into capillary beds Signup and view all the answers

What characterizes continuous capillaries?

Tight junctions between cells allowing small molecule exchange Signup and view all the answers

What is the main function of veins in the circulatory system?

Prevent backflow and aid blood flow to the heart Signup and view all the answers

Where are elastic arteries located in the body?

Organs near the heart Signup and view all the answers

What is the primary function of arterioles in the circulatory system?

Regulating blood flow into capillary beds Signup and view all the answers

What is a characteristic feature of sinusoid capillaries?

Irregularly shaped lumens with large gaps between cells Signup and view all the answers

What is the role of capillary beds in the circulatory system?

Facilitate exchange between blood and surrounding tissues Signup and view all the answers