Anatomy and Physiology: Blood Vessels 1

What is the function of blood vessels in the circulatory system?

• To maintain blood pressure and carry nutrients

• To regulate body temperature and produce hormones

• To store excess blood and protect the heart

• To aid in digestion and absorb nutrients

What is the role of the tunica media in blood vessels?

• To form a slick surface for blood movement

• To absorb pressure fluctuations from the heart

• To provide protection and reinforcement

• To regulate blood flow and blood pressure

Which type of blood vessel has the thickest tunica media?

• Capillaries

• Muscular arteries

• Elastic arteries

• Veins

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

• To store excess blood and absorb toxins

• To regulate blood pressure and produce heat

• To exchange nutrients and gases

• To aid in digestion and absorb nutrients

What happens to the blood vessels in response to cold temperature?

• Arteries constrict to conserve heat

• Veins dilate to release heat

• Sphincters tighten to conserve heat

• Sphincters relax to disperse heat

What is the purpose of venous valves in the circulatory system?

• To regulate blood pressure

• To prevent backflow of blood

• To distribute nutrients to cells

• To absorb pressure fluctuations

Which blood vessel type contains the most elastin?

• Muscular arteries

• Veins

• Elastic arteries

• Capillaries

What is the function of the endothelium in blood vessels?

• To form a slick surface for blood movement

• To regulate blood flow and blood pressure

• To provide protection and reinforcement

• To absorb pressure fluctuations from the heart

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

• To act as a transfer station between arteries and veins

• To merge into larger veins

• To branch out into capillaries

• To carry blood away from the heart

What is the purpose of the tunica externa in blood vessels?

• To protect and reinforce the blood vessel

• To regulate blood flow and blood pressure

• To form a slick surface for blood movement

• To absorb pressure fluctuations from the heart