Arteries and viens

What do arteries carry?

• Nutrients from the digestive system to the body

• Deoxygenated blood from the body to the heart

• Oxygenated blood from the heart to the body tissues

• Blood from the capillaries to the heart

What is the pulse in the context of arteries?

• The expansion of veins

• The contraction of the heart

• A surge of high pressure blood passing through

• A measure of heart rate

What helps arteries to withstand high blood pressure?

• A large amount of elastic fibers

• A thin layer of endothelial cells

• A large amount of collagen

• Valves within the arteries

What is the role of elastic recoil in arteries?

• To reduce friction between blood and the artery wall

• To help keep the blood moving forward

• To prevent blood from flowing backwards

• To increase the blood pressure

What is the function of endothelial cells in arteries?

• To produce red blood cells

• To provide elasticity to the artery walls

• To reduce friction between blood and the artery wall

• To regulate blood flow

How does the structure of veins differ from arteries?

• Veins have a smaller lumen compared to arteries

• Veins have a thicker wall than arteries

• Veins have a larger lumen and carry a greater volume of blood compared to arteries

• Veins contain a large amount of collagen

What is the role of valves in veins?

• To increase blood pressure

• To help keep the blood moving in the forward direction

• To reduce the volume of blood in veins

• To produce red blood cells

Why is blood in veins under low pressure?

• Because it contains less nutrients

• Because it is traveling back to the heart

• Because it is oxygenated

• Because it travels in pulses

How do skeletal muscles contribute to blood movement in veins?

• By absorbing excess blood

• By producing red blood cells

• By increasing blood pressure

• By squeezing the veins during contraction

What effect does inhaling have on blood movement in chest veins?

• It decreases the pressure in the chest cavity, helping blood move towards the heart

• It increases the pressure in the chest cavity, preventing blood from moving

• It has no effect on blood movement

• It decreases blood volume in the veins