MGA - Ch. 21

Arteries can constrict or dilate as needed because of the smooth muscle found in the A. tunica intima. B. tunica media. C. tunica adventitia. D. tunica externa. E. tunica interna.

B

In the pulmonary circulation, the _____ carry blood to the lungs. A. carotid sinuses B. pulmonary arteries C. coronary arteries D. superior vena cava and inferior vena cava E. aorta

B

Systemic blood vessels transport blood A. from the left ventricle through the body to the left atrium. B. from the left ventricle through the body to the right atrium. C. from the right ventricle through the body to the left atrium. D. from the right ventricle through the body to the right atrium. E. from the left ventricle to the lungs.

B

The abdominal aorta divides at L5 to form the two A. inferior mesenteric arteries. B. common iliac arteries. C. superior mesenteric arteries. D. femoral arteries. E. renal arteries.

B

Veins that return blood directly to the heart include the A. brachiocephalic vein. B. superior vena cava. C. portal vein. D. azygos vein. E. pulmonary arteries.

B

When contrasting arteries and veins, which of the following statements is true? A. Veins have thicker walls than arteries. B. Arteries have a thicker tunica media than veins. C. Veins have a tunica media while arteries do not. D. Arteries have valves, but veins do not. E. Arteries have smooth muscle in their walls, but veins do not.

B

Which of the following acts as a storage area for blood? A. the aorta B. the veins C. capillaries D. arterioles E. the arteries

B

Which statement is CORRECT? A. For an artery and vein of the same diameter, the vein would have a thicker wall. B. Veins contain valves and arteries do not. C. Blood pressure is lower in arteries than in veins. D. When empty, an artery is more likely to be collapsed (flattened) than a vein. E. Both arteries and veins are under pressure.

B

Fill in the missing blood vessel. ext. jugular vein; _____________; superior vena cava

brachiocephalic vein

An obstruction in the inferior vena cava would hamper the return of blood from the A. head and neck. B. upper extremities. C. lungs. D. abdomen, pelvis, and lower limbs. E. heart.

D

The _______ arteries branch from the ascending aorta.

coronary

In the aorta, A. the blood pressure and blood velocity are both high. B. the velocity of blood flow is high, but blood pressure is low. C. the resistance to blood flow is high, but velocity of blood flow is low. D. the resistance to blood flow and the blood pressure are both low. E. velocity is diminished because the total cross-sectional area is small.

A

The first blood vessels that branch from the ascending aorta are the A. coronary arteries. B. brachiocephalic arteries. C. common carotid arteries. D. subclavian arteries. E. pulmonary arteries.

A

The hepatic portal vein is formed by the union of the splenic vein and the A. superior mesenteric vein. B. inferior mesenteric vein. C. hepatic vein. D. renal vein. E. gastric vein.

A

The kidneys are supplied by the A. renal arteries. B. suprarenal arteries. C. lumbar arteries. D. inferior mesenteric arteries.

A

Which of the following arteries branches directly from the aortic arch? A. brachiocephalic artery B. coronary artery C. pulmonary artery D. right subclavian artery E. right common carotid artery

A

Which of the following arteries sends branches to the stomach and liver?] A. celiac artery B. superior mesenteric artery C. inferior mesenteric artery D. renal artery E. splenic artery

A

Blood is moved through the vascular system by A. valves in the wall of the blood vessels. B. peristalsis caused by smooth muscle in the blood vessel walls. C. pressure gradients created by the heart. D. osmotic pressure. E. viscosity of the blood.

C

In which type of blood vessels is the blood pressure the lowest? A. capillaries B. arteries C. vena cavas D. veins E. arterioles

C

Systemic circulation A. carries blood from the right ventricle to the lungs. B. includes all arteries but the veins are part of the pulmonary circulation pathway. C. includes the aorta and all of its branches. D. ends in capillaries of the toes. E. includes blood flow to the body, but not the brain.

C

The blood vessels that are under the greatest pressure are the A. arterioles. B. capillaries. C. elastic arteries. D. veins. E. venules.

C

Veins A. carry blood away from the heart. B. carry blood under very high pressure. C. may contain valves and are lined with endothelium. D. are described as strong, rigid vessels that always carry oxygenated blood. E. have thick, many layered walls.

C

What artery supplies the small intestine, cecum, ascending colon, and transverse colon? A. inferior phrenic artery B. lumbar artery C. superior mesenteric artery D. inferior mesenteric artery

C

Which of the following blood vessels supplies blood to the diaphragm? A. axillary artery B. intercostal artery C. superior phrenic artery D. inferior mesenteric artery E. gastric artery

C

Select the description below that describes pulmonary circulation. A. System of blood vessels that carries blood from the heart to the lungs and back to the right atrium of the heart. B. System of blood vessels that a carries blood from the heart to the rest of the body. C. Finely dissected blood vessels that allow for the exchange of nutrients in the tissues. D. System of blood vessels that carries blood from the heart to the lungs and back to the left atrium of the heart.

D

The azygos vein drains blood from the _____ into the superior vena cava. A. head B. upper arm C. kidneys D. thorax E. abdominal wall

D

Which of the following thoracic organs is supplied by a parietal branch of the thoracic aorta? A. the heart B. the lungs C. the esophagus D. the intercostal muscles E. the thymus gland

D

Why does nutrient-rich blood of the hepatic portal vein pass first through the liver before this blood is returned to the heart? A. To allow the liver to add more wastes to the blood B. The liver needs more nourishment than other tissues; hence nutrients first pass through the liver C. To allow the liver to add more nutrients to the blood D. To allow the liver to store or modify the nutrients

D

The three unpaired arteries arising from the abdominal aorta are the ___________. A. renal artery, hepatic artery, common iliac artery B. lumbar artery, celiac trunk, gonadal artery C. hepatic artery, lumbar artery, common iliac artery D. superior mesenteric artery , inferior mesenteric artery, gonadal artery E. celiac trunk, superior mesenteric artery, inferior mesenteric artery

E

Venous drainage from the posterior thoracic wall enters the superior vena cava via the ______ vein. A. subclavian B. internal thoracic C. accessory hemiazygos D. hemiazygos E. azygos

E

Which of the following best describes arteries? A. strong, rigid vessels that carry blood under high pressure B. thin, elastic vessels that transport blood under low pressure C. elastic vessels that connect arterioles and venules D. fragile vessels that are prone to rupture. E. strong, elastic vessels that carry blood under high pressure

E

Fill in the missing blood vessel. hepatic vein; _____________; right atrium

inferior vena cava