Review 4.3 - 4.4: Blood Vessels and Blood

Which blood vessels are responsible for the exchange of nutrients and wastes with cells?

• Arterioles

• Capillary beds

• Veins

• Venules

What are the smaller veins that branch off the large ones called?

• Arterioles

• Capillary beds

• Venules

• Arteries

Which vessels carry blood toward the heart?

• Arteries

• Arterioles

• Veins

• Capillary beds

In diagrams, what color do arteries and arterioles often appear, and what does this indicate?

• Blue, indicating oxygen-poor blood

• Red, indicating oxygen-rich blood

• Blue, indicating nutrient-rich blood

• Red, indicating carbon dioxide-rich blood

What is the outermost layer of arteries and veins called?

• Tunica media

• Tunica intima

• Tunica externa

• Tunica adventitia

Which layer of blood vessels is responsible for allowing them to contract and relax?

• Tunica externa

• Tunica media

• Tunica intima

• Tunica adventitia

What is the primary structural difference between capillaries and other blood vessels like arteries and veins?

• Capillaries have a tunica media

• Capillaries have a single layer of endothelial cells

• Capillaries have a tunica externa

• Capillaries have multiple layers

How does the general shape of veins compare to arteries?

• Rounded

• Irregular, Flattened

• Triangular

• Cylindrical

Which has thicker walls, arteries or veins?

• Arteries

• Veins

• Both have the same thickness

• Neither have walls

Which has higher blood pressure, arteries or veins?

• Arteries

• Veins

• Both have the same pressure

• Neither have pressure