A&P II Ch. 18

Pulmonary veins carry blood to the aorta. pulmonary circuit. right atrium. lungs. left atrium.

left atrium.

Which of the following break(s) the rule that arteries carry oxygenated blood away from the heart? common carotid artery superior vena cava pulmonary veins aorta pulmonary arteries

pulmonary arteries

Arteries of the pulmonary circuit: a. direct blood back to the heart from the lungs. b. carry deoxygenated blood to the lungs. c. surround the small air pockets called alveoli. d. deliver oxygen to the pulmonary capillaries.

b. carry deoxygenated blood to the lungs.

Blood moves forward through veins because of all of the following except a. valves in the veins preventing the backward flow of blood. b. pumping by the smooth muscle in the wall of the vein. c. skeletal muscle compression. d. the pressure in the veins is lower than in the arteries. e. valves permitting flow of blood in one direction only.

b. pumping by the smooth muscle in the wall of the vein.

Vasculogenesis refers to a. the formation of veins only. b. the formation of the first vessels. c. the growth of new blood vessels from preexisting vessels. d. the development of heart tissue. e. the formation of arteries only.

b. the formation of the first vessels.

The systemic circuit delivers oxygenated blood to ________ and returns blood to the ________. lungs; right atrium lungs; right ventricle body organs; left atrium body organs; right atrium lungs; left atrium

body organs; right atrium

The earliest precursor cells that give rise to blood cells are hemangioblasts. angioblasts. lymphoid stem cells. hematopoietic stem cells. reticulocytes.

hemangioblasts.

The left atrium pumps blood to the: left ventricle. right atrium. systemic circuit. pulmonary circuit.

left ventricle.

Pulmonary arteries carry blood to the lungs. systemic circuit. right atrium. left atrium. aorta.

lungs.

Blood flow through a capillary is controlled by the plexus. thoroughfare channel. vasa vasorum. precapillary sphincter. venule.

precapillary sphincter.

In a capillary bed, bands of smooth muscle at the entrance to each capillary are called: ateriovenous anastomoses. collaterals. precapillary sphincters. thoroughfare channels.

precapillary sphincters.

Blood is pumped into the pulmonary circuit from the left ventricle. right atrium. right ventricle. left atrium.

right ventricle.

These vessels hold the largest percentage of the blood supply. pulmonary circuit vessels systemic venous system systemic arterioles the heart systemic arteries

systemic venous system

Angiogenesis refers to a. the formation of the first vessels. b. the development of heart tissue. c. the formation of arteries only. d. the growth of new blood vessels from preexisting vessels. e. the formation of veins only.

the growth of new blood vessels from preexisting vessels.

Of the following arteries, the one that is an elastic artery is the left subclavian artery. the external carotid artery. the brachial artery. the femoral artery. none of the above.

the left subclavian artery.

Venoconstriction reduces the diameter of which vessel? artery arteriole venule capillary vein

vein

The large vessels that return blood to the heart are called arteries. capillaries. arterioles. veins. venules.

veins.

Which of the following are the smallest venous vessels? venous valves venules medium veins capillaries large veins

venules

After blood leaves the capillaries, it enters the veins. arteries. venules. capillaries. arterioles.

venules.

Arrange the following vessels in the order in which blood would pass through them 1. pulmonary venules 2. pulmonary trunk 3. pulmonary veins 4. alveolar capillaries 5. pulmonary arterioles 6. pulmonary arteries 2, 3, 1, 4, 5, 6 2, 6, 5, 4, 1, 3 6, 7, 4, 1, 3, 2 5, 3, 1, 4, 2, 6 4, 6, 3, 2, 1, 5

2, 6, 5, 4, 1, 3

Arrange the structures in the following list in the order that blood will encounter as it flows from the heart back to the heart in the cardiovascular circuit. 1. venules 2. arterioles 3. capillaries 4. elastic arteries 5. medium veins 6. large veins 7. muscular arteries 7, 4, 2, 3, 1, 5, 6 4, 7, 2, 3, 1, 5, 6 2, 7, 6, 3, 1, 5, 6 5, 6, 1, 3, 2, 7, 4 6, 5, 1, 3, 2, 7, 4

4, 7, 2, 3, 1, 5, 6

All the vessels of the systemic arterial system originate from the: pulmonary trunk. aorta. superior vena cava. brachiocephalic trunk.

aorta.

RBCs move single file through this structure. vein venule capillary artery arteriole

capillary

Which of the following is not a characteristic of venous valves? a. permit blood flow in one direction only b. preventing backflow of blood c. channeling blood toward the heart d. channeling blood away from the heart e. all of the above

d. channeling blood away from the heart

The venous system: a. contains one-third of the body's total volume of blood. b. consists of vessels (veins) that cannot constrict. c. is a high pressure system. d. consists of vessels (veins) that have valves.

d. consists of vessels (veins) that have valves.

The pulmonary trunk: enters the left atrium. exits the left ventricle. enters the right atrium. exits the right ventricle.

exits the right ventricle.

Compared to arteries, veins have thinner walls. have more smooth muscle in their tunica media. are usually round when cut. have a pleated endothelium. have internal and external elastic membranes.

have thinner walls.