Blood Vessels 2

Question 1

Arterial pressure is equal to
A.	venous pressure.
B.	capillary hydrostatic pressure.
C.	blood pressure.
D.	peripheral pressure.
E.	none of the above

Answer 1

C. blood pressure.

Question 2

During increased exercise
A.	vasoconstriction occurs at the active skeletal
muscles.
B.	venous return increases.
C.	both cardiac output and stroke volume
decrease.
D.	all of the above
E.	A and C only

Answer 2

B. venous return increases.

Question 3

At the knee, the small saphenous, tibial,
and peroneal veins unite to form the
\_\_\_\_\_ vein.
A.	femoral
B.	popliteal
C.	external iliac
D.	internal iliac
E.	inferior vena cava

Answer 3

B. popliteal

Question 4

The only blood vessels whose walls
permit exchange between the blood and
the surrounding interstitial fluids are the
A.	arteries.
B.	arterioles.
C.	veins.
D.	venules.
E.	capillaries.

Answer 4

E. capillaries.

Question 5

Venous valves are responsible for
A.	preventing backflow.
B.	pushing blood away from the heart.
C.	pushing blood toward the heart.
D.	both A and B
E.	both A and C

Answer 5

A. preventing backflow.

Question 6

Venoconstriction \_\_\_\_\_ the amount of
blood within the venous system, which
\_\_\_\_\_ the volume in the arterial system.
A.	doubles; decreases
B.	reduces; increases
C.	decreases; doubles
D.	increases; reduces
E.	none of the above

Answer 6

B. reduces; increases

Question 7

In response to hemorrhage, there is
A.	decreased vasomotor tone and peripheral
vasodilation.
B.	increased parasympathetic stimulation of the
heart.
C.	mobilization of the venous reserve.
D.	all of the above
E.	both A and C

Answer 7

C. mobilization of the venous reserve.

Question 8

Materials can move across capillary walls
by
A.	diffusion and osmosis.
B.	active transport and bulk transport.
C.	secretion and adsorption.
D.	all of the above
E.	A and B only

Answer 8

E. A and B only

Question 9

Under normal cardiovascular
circumstances, blood flow is \_\_\_\_\_
cardiac output.
A.	higher than
B.	less than
C.	equal to
D.	greater than
E.	lower than

Answer 9

C. equal to

Question 10

Compared with other vessels of the human
vascular system, \_\_\_\_\_ pressure is usually
low.
A.	venous
B.	capillary hydrostatic
C.	blood
D.	peripheral
E.	none of the above

Answer 10

A. venous

Question 11

When the popliteal vein reaches the
femur, it becomes the \_\_\_\_\_ vein, before
penetrating the abdominal wall.
A.	femoral
B.	deep femoral
C.	internal iliac
D.	external iliac
E.	lumbar

Answer 11

A. femoral

Question 12

Symptoms of shock include all of the
following, except
A.	hypotension.
B.	rapid, weak pulse.
C.	decreased urine formation.
D.	acidosis.
E.	profuse sweating.

Answer 12

E. profuse sweating.

Question 13

Blood flow through a capillary is
regulated by the
A.	vasa vasorum.
B.	capillary plexus.
C.	precapillary sphincter.
D.	arterial anastomosis.
E.	central channel.

Answer 13

C. precapillary sphincter.

Question 14

Which of the following affects blood flow
through the body?
A.	blood viscosity
B.	vessel diameter
C.	turbulence
D.	resistance
E.	all of the above

Answer 14

E. all of the above

Question 15

The layer of the arteriole wall that
provides the properties of contractility and
elasticity is the
A.	tunica adventitia.
B.	tunica media.
C.	tunica intima.
D.	tunica externa.
E.	tunica mater.

Answer 15

B. tunica media.

Question 16

Branches off the aortic arch include the
A.	right and left subclavian arteries.
B.	left subclavian artery.
C.	left common carotid and right axillary
arteries.
D.	brachio and right axillary arteries.
E.	both A and C

Answer 16

B. left subclavian artery.

Question 17

The \_\_\_\_\_ vein is formed by the fusion of
the greater saphenous vein, femoral vein,
and deep femoral vein.
A.	internal iliac
B.	external iliac
C.	common iliac
D.	inferior vena cava
E.	azygous

Answer 17

B. external iliac

Question 18

Blood moves forward through veins by all of the
following, except
A. because the pressure in the veins is lower than in the
arteries.
B. because of contraction–relaxation pumping of the
smooth muscle in the wall of the vein.
C. with the aid of the thoracoabdominal pump.
D. because valves in the veins prevent the backflow of
blood.
E. with the aid of contractions of skeletal muscles.

Answer 18

B. because of contraction–relaxation pumping of the

smooth muscle in the wall of the vein.

Question 19

Elevated levels of the hormones ANP and
BNP will produce increased
A.	fluid loss through the kidneys.
B.	blood volume.
C.	sodium ion levels in blood.
D.	venous return.
E.	B and C

Answer 19

A. fluid loss through the kidneys.

Question 20

The secretion of ADH and aldosterone is
typical of the body’s long-term
compensation following
A.	a heart attack.
B.	hypertension.
C.	a serious hemorrhage.
D.	heavy exercise.
E.	a heavy meal.

Answer 20

C. a serious hemorrhage.