Arteries and Arterial

What is the primary function of arteries?

• Carry blood from the organs back to the heart

• Carry blood away from the heart to the organs

• Exchange gases and nutrients at the cellular level

• Control the body temperature

What happens to the blood pressure in arteries when the heart beats?

• It remains constant

• It decreases

• It increases due to a surge of blood

• It stops momentarily

What is the role of collagen in the artery wall?

• It provides elasticity to the artery wall

• It contracts to control blood flow

• It reduces friction for blood flow

• It strengthens the artery wall against blood pressure

How does the structure of arterioles differ from arteries in terms of muscle layer?

• Arterioles have a thinner smooth muscle layer than arteries

• Arterioles have a thicker smooth muscle layer than arteries

• Arterioles and arteries have the same thickness of smooth muscle layer

• Arterioles do not have a smooth muscle layer

What is the effect of vasodilation in arterioles?

• It decreases blood flow through the capillaries

• It stops blood flow through the capillaries

• It has no effect on blood flow through the capillaries

• It increases blood flow through the capillaries

What protein is rich in the elastic fibers of arteries?

• Myosin

• Keratin

• Elastin

• Collagen

What is the central cavity of the artery called?

• Atrium

• Endothelium

• Lumen

• Vasculum

What is the function of endothelial cells in arteries?

• They reduce friction as blood flows through

• They contract to control blood flow

• They provide structural strength

• They produce the pulse effect

What happens to the elastic fibers in arteries when the heart contracts?

• They break down

• They stretch and then recoil

• They thicken

• They contract

What is the primary role of smaller arteries compared to larger arteries?

• To exchange gases and nutrients

• To carry blood back to the heart

• To store blood

• To control how much blood flows to different organs