Question 1

Most small molecules pass through a capillary wall through which route?

Accepted Answer

A)   via direct diffusion through the endothelium
B)   via pinocytotic vesicles
C)   through intercellular clefts
D)   through tight junctions

Question 2

Which vessel is most commonly used to bypass a damaged coronary artery in coronary bypass surgery?

Accepted Answer

A)   azygos vein
B)   great saphenous vein
C)   femoral artery
D)   internal carotid artery

Question 3

Why are aneurisms, or a sac-like outpocketing of a vessel wall, much more common in arteries than veins?

Accepted Answer

A)   Pressure against the walls of arteries is higher than the pressure against the walls of veins.
B)   Arteries have a thicker tunica media, making them more vulnerable than veins.
C)   Arteries have a thinner tunica externa than veins.
D)   Arteries have more vasa vasorum than veins, making the tunica externa weaker in arteries.

Question 4

The pulse of the posterior tibial artery is palpated behind the knee.

Accepted Answer

A) True 
 B)False

Question 5

Systemic venous blood that is oxygen-poor but contains the lowest concentration of nitrogenous wastes occurs in the

Accepted Answer

A)   renal veins.
B)   hepatic portal vein.
C)   pulmonary veins.
D)   umbilical veins of the fetus.

Question 6

Arterioles and venules have a vasa vasorum to provide nutrients to their outer walls, whereas the inner walls receive nutrients from blood in the lumen.

Accepted Answer

A) True 
 B)False

Question 7

Which artery arises from the inferior part of the abdominal aorta and supplies the distal half of the large intestine?

Accepted Answer

A)   gonadal artery
B)   median sacral artery
C)   superior phrenic artery
D)   inferior mesenteric artery

Question 8

The hepatic portal system has two distinct capillary beds separated by a portal vein. What are the functions of these two capillary beds?

Accepted Answer

A)   The first picks up digested nutrients, and the second delivers these nutrients to liver cells.
B)   The first nourishes the digestive tube, and the second picks up nutrients from the digestive tube.
C)   The first provides oxygen to the liver, and the second picks up nutrients from the liver.
D)   The first picks up toxins from the liver, and the second delivers them to the digestive tube for detoxification.

Question 9

What prevents the backflow of blood in veins?

Accepted Answer

A)   valves
B)   the narrowed lumen
C)   thick smooth muscle and elastic layers
D)   increased blood pressure

Question 10

The ________ vein is the superficial vein running along the medial aspect of the forearm and arm.

Accepted Answer

The answer of The ________ vein is the superficial vein...

Question 11

The correct proximal to distal sequence of the three vessels branching from the aortic arch is

Accepted Answer

A)   brachiocephalic, left common carotid, left subclavian.
B)   brachiocephalic, left subclavian, left common carotid.
C)   left common carotid, left subclavian, brachiocephalic.
D)   left subclavian, left common carotid, brachiocephalic.

Question 12

The presence of ________ in the veins and the action of skeletal muscle pressing on the walls ensure that blood return to the heart is in one direction.

Accepted Answer

The answer of The presence of ________ in the veins...

Question 13

Which of the following statements about arteries is false?

Accepted Answer

A)   Arterial walls are thicker than venous walls.
B)   Arteries have a smaller lumen than veins of similar size.
C)   Arteries carry oxygenated blood to the heart.
D)   Arteries have more elastin than veins.

Question 14

Which arteries connect the basilar artery and the internal carotid artery forming the posterior aspect of the cerebral arterial circle?

Accepted Answer

A)   genicular arteries that encircle the knee
B)   posterior communicating arteries
C)   ulnar artery that encircles the elbow joint
D)   anterior communicating arteries

Question 15

What vessel in the fetus connects the pulmonary trunk to the aortic arch so that most of the blood bypasses the immature lungs?

Accepted Answer

A)   ductus venosus
B)   foramen ovale
C)   ductus arteriosus
D)   umbilical vein

Question 16

Microvasculature that provides nourishment to the outer walls of the aorta is called the

Accepted Answer

A)   tunica intima
B)   subendothelial layer
C)   tunica media
D)   tunica externa
E)   vasa vasorum

Question 17

The largest molecules that pass through the walls of typical capillaries are thought to use which route?

Accepted Answer

A)   direct diffusion through the endothelium
B)   pinocytotic vesicles
C)   intercellular clefts
D)   tight junctions

Question 18

Fenestrated capillaries

Accepted Answer

A)   are located in the central nervous system.
B)   have pores in their walls.
C)   permit the movement of very few molecules.
D)   occur in most of the organs of the body.

Question 19

Postcapillary venules function much like true capillaries.

Accepted Answer

A) True 
 B)False

Question 20

The middle and posterior cerebral arteries are connected by the posterior communicating arteries.

Accepted Answer

A) True 
 B)False

Exam 20: Blood Vessels

The largest molecules that pass through the walls of typical capillaries are thought to use which route?

Correct AnswerverifiedShow Answer

Which of the following statements about arteries is false?

Correct AnswerverifiedShow Answer

Fenestrated capillaries

Correct AnswerverifiedShow Answer

Arterioles and venules have a vasa vasorum to provide nutrients to their outer walls, whereas the inner walls receive nutrients from blood in the lumen.

Correct AnswerverifiedShow Answer

Which vessel is most commonly used to bypass a damaged coronary artery in coronary bypass surgery?

Correct AnswerverifiedShow Answer

What vessel in the fetus connects the pulmonary trunk to the aortic arch so that most of the blood bypasses the immature lungs?

Correct AnswerverifiedShow Answer

The correct proximal to distal sequence of the three vessels branching from the aortic arch is

Correct AnswerverifiedShow Answer

Which artery arises from the inferior part of the abdominal aorta and supplies the distal half of the large intestine?

Correct AnswerverifiedShow Answer

What prevents the backflow of blood in veins?

Correct AnswerverifiedShow Answer

The middle and posterior cerebral arteries are connected by the posterior communicating arteries.

Correct AnswerverifiedShow Answer

The presence of ________ in the veins and the action of skeletal muscle pressing on the walls ensure that blood return to the heart is in one direction.

Correct AnswerverifiedShow Answer

The hepatic portal system has two distinct capillary beds separated by a portal vein. What are the functions of these two capillary beds?

Correct AnswerverifiedShow Answer

Why are aneurisms, or a sac-like outpocketing of a vessel wall, much more common in arteries than veins?

Correct AnswerverifiedShow Answer

Most small molecules pass through a capillary wall through which route?

Correct AnswerverifiedShow Answer

Systemic venous blood that is oxygen-poor but contains the lowest concentration of nitrogenous wastes occurs in the

Correct AnswerverifiedShow Answer

Postcapillary venules function much like true capillaries.

Correct AnswerverifiedShow Answer

The pulse of the posterior tibial artery is palpated behind the knee.

Correct AnswerverifiedShow Answer

The ________ vein is the superficial vein running along the medial aspect of the forearm and arm.

Correct AnswerverifiedShow Answer

Microvasculature that provides nourishment to the outer walls of the aorta is called the

Correct AnswerverifiedShow Answer

Which arteries connect the basilar artery and the internal carotid artery forming the posterior aspect of the cerebral arterial circle?

Correct AnswerverifiedShow Answer

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