Chapter 21-- A&PII

Which of the following blood vessels carries blood away from the heart to other organs?

• arteries

• capillaries

• venules

• arterioles

Which layer of the arterial wall is responsible for vasoconstriction?

• tunica interna

• tunica media

• tunica externa

• tunica albuginea

A blockage in the proximal portion of the right subclavian artery will not only affect circulation to the right arm, but also to the

• left arm

• left ventricle

• right ventricle

• left vertebral artery

In resting individuals, which vessels serve as a large blood reservoir from which blood can be quickly diverted to other vessels as needed?

• Arteries and arterioles

• Arterioles and capillaries

• Venules and capillaries

• Veins and venules

In order to supply nourishment to liver tissue, which vessel must deliver blood to the organ?

• hepatic artery

• hepatic vein

• hepatic portal vein

• superior mesenteric artery

If a patient is confined to bed and is unable to walk at all, which of the following will be seriously affected?

• blood flow to the lungs

• blood flow to the kidneys

• the circulation returning from the lower body

• circulation in the jugular veins

Capillaries are also referred to as

• exchange vessels.

• vasoconstrictors.

• vasodilators.

• pressure reservoirs.

Which of the following is the most important method of capillary exchange?

• diffusion

• facilitated diffusion

• primary active transport

• bulk flow

Which of the following types of tissues contains continuous capillaries?

• skeletal muscle

• smooth muscle

• connective tissue

• lungs

• all of these choices

The alternate route of blood flow to a body part through an anastomosis is called

• a thoroughfare channel

• a blood reservoir.

• a detour route

• collateral circulation.