Blood Vessels 1

Question 1

The muscular layer of a blood vessel is the
A.	tunica intima.
B.	tunica externa.
C.	tunica media.
D.	tunica interna.
E.	tunica adventitia

Answer 1

C. tunica media.

Question 2

Which of the following is the innermost
layer of a blood vessel?
A.	tunica intima
B.	external elastic membrane
C.	tunica media
D.	internal elastic membrane
E.	tunica externa

Answer 2

A. tunica intima

Question 3

Which type of artery has a poorly defined
tunica externa?
A.	arterioles
B.	elastic
C.	connective
D.	muscular
E.	vascular

Answer 3

A. arterioles

Question 4

Blood from the brain returns to the heart
by way of the \_\_\_\_\_ vein.
A.	vertebral
B.	azygos
C.	innominate
D.	internal jugular
E.	external jugular

Answer 4

D. internal jugular

Question 5

Compared to arteries, veins
A.	are more elastic.
B.	have more smooth muscle in their tunica
media.
C.	have a pleated endothelium.
D.	have thinner walls.
E.	hold their shape better when cut.

Answer 5

D. have thinner walls.

Question 6

Vasoconstriction and vasodilation affect
the heart in what way?
A.	peripheral blood pressure
B.	capillary flow
C.	atrial kick
D.	afterload
E.	all of the above

Answer 6

E. all of the above

Question 7

The femoral artery is an example of which
type of artery?
A.	arteriolar
B.	elastic
C.	connective
D.	muscular
E.	vascular

Answer 7

D. muscular

Question 8

The goal of cardiovascular regulation includes
all of the following, except to ensure that
A. blood flow changes occur at the appropriate time.
B. blood flow changes occur in the appropriate area.
C. changes occur without drastically altering blood
pressure.
D. sufficient concentrations of blood cells are present to
meet emergency situations.
E. changes occur without drastically altering blood flow
to a vital organ.

Answer 8

D. sufficient concentrations of blood cells are present

to meet emergency situations.

Question 9

The following is a list of the vessels that blood passes
through from the heart and back to the heart.
1.	venules
2.	arterioles
3.	capillaries
4.	elastic arteries
5.	medium veins
6.	large veins
7.	muscular arteries	
The correct order in which blood passes through these
structures from leaving the heart until its return is
A.	7, 4, 2, 3, 1, 5, 6.
B.	6, 5, 1, 3, 2, 7, 4.
C.	5, 6, 1, 3, 2, 7, 4.
D.	2, 7, 6, 3, 1, 5, 6.
E.	4, 7, 2, 3, 1, 5, 6.

Answer 9

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

Question 10

The fusion of the brachiocephalic veins
forms the
A.	inferior vena cava.
B.	superior vena cava.
C.	innominate vein.
D.	subclavian vein.
E.	azygos vein.

Answer 10

B. superior vena cava.

Question 11

Which of the following can result from an
aneurysm in the brain?
A.	hypertension
B.	quadriplegia
C.	stroke
D.	myocardial infarction
E.	all of the above

Answer 11

C. stroke

Question 12

Stimulation of the aortic baroreceptors results in
A. stimulation of the cardioaccelerator center in the
brain.
B. increased sympathetic stimulation of the heart.
C. increased activity by the parasympathetic nervous
system.
D. stimulation of the vasomotor center.
E. increased vasomotor tone.

Answer 12

C. increased activity by the parasympathetic nervous

system.

Question 13

Arteriosclerosis can lead to
A.	hypertension.
B.	tachycardia.
C.	coronary artery disease.
D.	both A and C
E.	all of the above

Answer 13

D. both A and C

Question 14

Capillaries that have a complete lining are
called
A.	continuous capillaries.
B.	fenestrated capillaries.
C.	sinusoidal capillaries.
D.	sinusoids.
E.	vasa vasorum.

Answer 14

A. continuous capillaries.

Question 15

The pressure that declines from 35 mm Hg
to 18 mm Hg is the
A.	venous pressure.
B.	capillary hydrostatic pressure.
C.	blood pressure.
D.	peripheral pressure.
E.	none of the above

Answer 15

B. capillary hydrostatic pressure.

Question 16

The inferior vena cava is classified as a(n)
A.	large vein.
B.	venule.
C.	medium vein.
D.	arteriovenule.
E.	venous valve.

Answer 16

A. large vein.

Question 17

Anxiety can result in
A.	increased stimulation of the cardioinhibitory
center by higher brain centers.
B.	increased stimulation of the cardioaccelerator
center by higher brain centers.
C.	decreased heart rate.
D.	decreased blood pressure.
E.	both C and D

Answer 17

B. increased stimulation of the
cardioaccelerator center by higher brain
centers.

Question 18

The deep veins of the lower leg include
the \_\_\_\_\_ veins.
A.	internal iliac
B.	small saphenous and popliteal
C.	anterior and posterior tibial and peroneal
D.	peroneal and popliteal
E.	small saphenous and posterior tibial

Answer 18

C. anterior and posterior tibial and peroneal

Question 19

Capillaries with an incomplete lining are
called
A.	incomplete capillaries.
B.	continuous capillaries.
C.	fenestrated capillaries.
D.	sinuses.
E.	vasa vasorum.

Answer 19

C. fenestrated capillaries.

Question 20

Which of the following are the smallest
venous vessels?
A.	large veins
B.	venules
C.	medium veins
D.	arteriovenules
E.	venous valves

Answer 20

B. venules