Blood Vessels 3

Question 1

After passing the first rib, the subclavian
artery becomes the \_\_\_\_\_ artery.
A.	radial
B.	ulnar
C.	brachial
D.	axillary
E.	digital

Answer 1

D. axillary

Question 2

You would expect to find fenestrated
capillaries in
A.	skeletal muscles.
B.	cardiac muscle.
C.	the pancreas.
D.	the spleen.
E.	skin.

Answer 2

C. the pancreas.

Question 3

Blood flow through the circulatory system
is affected by all of the following, except
A. the presence or absence of collateral systems.
B. the viscosity of the blood.
C. the amount of friction in the blood vessels.
D. the length and diameter of the blood vessels.
E. pressure differences.

Answer 3

A. the presence or absence of collateral

systems.

Question 4

The two common iliac veins form the
A.	femoral vein.
B.	greater saphenous vein.
C.	inferior vena cava.
D.	hepatic portal vein.
E.	innominate vein.

Answer 4

C. inferior vena cava.

Question 5

Factors that increase the risk of
atherosclerosis include all of the
following, except
A.	smoking.
B.	lack of exercise.
C.	high-fat diets.
D.	obesity.
E.	a family history of low blood pressure.

Answer 5

E. a family history of low blood pressure.

Question 6

In the upper arm, the axillary artery
becomes the \_\_\_\_\_ artery.
A.	radial
B.	ulnar
C.	brachial
D.	subclavian
E.	digital

Answer 6

C. brachial

Question 7

Vascular resistance is related to all of the
following, except the
A.	length of a blood vessel.
B.	osmolarity of interstitial fluids.
C.	nature of the blood flow.
D.	viscosity of the blood.
E.	diameter of a blood vessel.

Answer 7

B. osmolarity of interstitial fluids.

Question 8

Which of the following contains the
greater volume of blood?
A.	the normal blood volume of the arterial
system
B.	the normal blood volume of the venous
system
C.	Neither is greater.

Answer 8

B. the normal blood volume of the venous

system

Question 9

Nutrients from the digestive tract enter the
A.	inferior vena cava.
B.	superior vena cava.
C.	hepatic portal vein.
D.	hepatic vein.
E.	azygos vein.

Answer 9

C. hepatic portal vein.

Question 10

In which of the following would the
resistance be greater?
A. a vessel 1 mm in diameter
B. a vessel 2 mm in diameter

Answer 10

A. a vessel 1 mm in diameter

Question 11

As blood travels from the aorta toward the
capillaries, the
A. pressure increases.
B. resistance increases.
C. flow increases.
D. viscosity increases.
E. diameter of the blood vessels increases.

Answer 11

B. resistance increases.

Question 12

In which of the following would the rate
of blood flow be lower?
A. a vessel 1 mm in diameter
B. a vessel 2 mm in diameter

Answer 12

A. a vessel 1 mm in diameter

Question 13

The brachial artery branches to form the
radial and \_\_\_\_\_ arteries.
A.	axillary
B.	digital
C.	ulnar
D.	subclavian
E.	brachiocephalic

Answer 13

C. ulnar

Question 14

How would increased sympathetic
stimulation of a blood vessel affect the
critical closing pressure of the vessel?
A.	It would increase.
B.	It would decrease.
C.	It would remain the same.

Answer 14

A. It would increase.

Question 15

Blood flow to a tissue will increase if the
A. level of oxygen at the tissue increases.
B. level of carbon dioxide at the tissue increases.
C. pH rises.
D. vessel constricts.
E. both A and C

Answer 15

B. level of carbon dioxide at the tissue

increases.

Question 16

The smallest arterial branch is called the
A.	arteries.
B.	arterioles.
C.	capillaries.
D.	venules.
E.	veins.

Answer 16

B. arterioles.

Question 17

Each of the following factors would
increase peripheral resistance, except
A.	increased sympathetic stimulation.
B.	elevated levels of epinephrine.
C.	vasodilation.
D.	irregularities in the vessel walls caused by
plaques.
E.	factors that cause increased hematocrits.

Answer 17

C. vasodilation.

Question 18

The two vertebral arteries fuse to form a
large artery, the
A.	circle of Willis.
B.	common carotid artery.
C.	external carotid artery.
D.	internal carotid artery.
E.	basilar artery.

Answer 18

E. basilar artery.

Question 19

Blood pressure is determined by
measuring the
A. size of the pulse.
B. pressure in the left ventricle.
C. force exerted by blood in a vessel against air
in a closed cuff.
D. degree of turbulence in a closed vessel.
E. force of contraction of the right ventricle.

Answer 19

C. force exerted by blood in a vessel against

air in a closed cuff.

Question 20

The layer of a blood vessel that separates
the tunica media and the tunica externa is
the
A.	tunica intima.
B.	external elastic lamina.
C.	tunica media.
D.	internal elastic lamina.
E.	tunica externa.

Answer 20

B. external elastic lamina.