A&P 2: Chapter 20

Front

Blood flow through a capillary bed is regulated by precapillary sphincters.

Back

true

Front

Do large veins, medium veins, and venules have valves to prevent the backflow of blood?

Back

False

Front

Vasomotion can raise or lower blood pressure throughout the body

Back

true

Front

The brachial vein is the most common site of blood pressure measurement with the sphygmomanometer.

Back

false

Front

Arteries are sometimes called the ________ vessels of the cardiovascular system because they have strong-resilient tissue structure.

Back

resistance

Front

Which vessels have the thickest tunica media?

Back

Large arteries

Front

What is the outermost wall of an artery or vein called, and what does it contain in large arteries and veins?

Back

tunica externa; vasa vasorum

Front

Alternative routes of blood supply are called__________

Back

anastomoses

Front

Which of the following is not a possible circulatory route from the heart?

• Heart → arteries → capillary bed → veins → heart
• Heart → arteries → capillary bed → vein → capillary bed → veins → heart
• Heart → arteries → capillary bed → vein → capillary bed → arteries → heart
• Heart → arteries → arterial anastomosis → capillary bed → veins → heart

Back

Heart → arteries → capillary bed → vein → capillary bed → arteries → heart

Front

Which of the following is associated with vasomotion?

Back

Smooth muscle in the tunica media