Blood Vessels 4

Question 1

Each of the following factors would
increase cardiac output, except
A. increased venous return.
B. decreased parasympathetic stimulation of the
heart.
C. increased sympathetic stimulation of the
heart.
D. increased blood concentration of insulin.
E. stimulation of the heart by epinephrine.

Answer 1

D. increased blood concentration of insulin.

Question 2

Which of the following is faster?
A. blood flow along the walls of a blood vessel
B. blood flow in the center of a large vessel

Answer 2

B. blood flow in the center of a large vessel

Question 3

Blood pressure is influenced by all of the
following, except
A.	age.
B.	sex.
C.	capillary density in the skin.
D.	time of day.
E.	body size.

Answer 3

B. sex.

Question 4

The internal carotids and the basilar artery
are interconnected by an anastomosis
called the
A.	common carotid artery.
B.	cerebral ring.
C.	circle of Willis.
D.	external carotid artery.
E.	none of the above

Answer 4

C. circle of Willis.

Question 5

The continual movement of fluid through the
interstitial spaces functions in all of the
following, except to
A. accelerate the distribution of nutrients and hormones.
B. assist the transport of insoluble substances that cannot
enter the capillaries.
C. help carry toxins and bacteria to cells of the immune
system.
D. flush hormones and wastes from the interstitial
spaces.
E. flush carbon dioxide from the interstitial spaces.

Answer 5

E. flush carbon dioxide from the interstitial spaces.

Question 6

Diffusion occurs between blood and
interstitial fluid in which of the following
vessels?
A.	arteries
B.	arterioles
C.	capillaries
D.	venules
E.	veins

Answer 6

C. capillaries

Question 7

Blood pressure increases with all of the
following, except increased
A.	cardiac output.
B.	peripheral resistance.
C.	blood volume.
D.	parasympathetic innervation.
E.	force of cardiac contraction.

Answer 7

D. parasympathetic innervation.

Question 8

Edema would likely occur when
A. the concentration of protein in the blood
increases.
B. hemorrhage occurs.
C. the heart is an insufficient pump.
D. blood hydrostatic pressure at the capillary
decreases.
E. the blood hydrostatic pressure in a capillary is
equal to the blood osmotic pressure.

Answer 8

C. the heart is an insufficient pump.

Question 9

The \_\_\_\_\_ divides the aorta into a
superior thoracic aorta and an inferior
abdominal aorta.
A.	pericardium
B.	mediastinum
C.	diaphragm
D.	peritoneum
E.	pleura

Answer 9

C. diaphragm

Question 10

Which of the following blood pressures is
greater?
A. when sympathetic stimulation to the heart
increases
B. when parasympathetic stimulation to the heart
increases
C. Neither is greater.

Answer 10

A. when sympathetic stimulation to the heart

increases

Question 11

The blood osmotic pressure is most
affected by changes in the
A.	concentration of plasma sodium ions.
B.	concentration of plasma glucose.
C.	concentration of plasma waste products.
D.	concentration of plasma proteins.
E.	number of white blood cells.

Answer 11

D. concentration of plasma proteins.

Question 12

Which of the following layers of a vessel
contains collagen fibers with scattered
bands of elastic fibers?
A.	tunica intima
B.	external elastic membrane
C.	tunica media
D.	internal elastic membrane
E.	tunica externa

Answer 12

E. tunica externa

Question 13

Which of the following is greater?
A. normal heart rate
B. heart rate during circulatory shock
C. Neither is greater.

Answer 13

B. heart rate during circulatory shock

Question 14

In the lower leg, the femoral artery
becomes the \_\_\_\_\_ artery.
A.	iliac
B.	deep femoral
C.	popliteal
D.	tibial
E.	peroneal

Answer 14

C. popliteal

Question 15

Which of the following blood pressures is
greater?
A.	when the peripheral vessels dilate
B.	when the peripheral vessels constrict
C.	Neither is greater.

Answer 15

B. when the peripheral vessels constrict

Question 16

Which of the following statements is false concerning
the movement of fluid between capillaries and interstitial
space?
A. Blood hydrostatic pressure forces fluid from the capillary to the
interstitial space.
B. Blood osmotic pressure moves fluid from the interstitial space to
the capillary.
C. The osmotic pressure of the interstitial fluid is less than the
blood osmotic pressure.
D. The hydrostatic pressure of the interstitial fluid does not oppose
the movement of fluid from the capillary.
E. The blood hydrostatic pressure and the blood osmotic pressure
are equal in magnitude but opposite in direction.

Answer 16

E. The blood hydrostatic pressure and the blood osmotic

pressure are equal in magnitude but opposite in direction.

Question 17

After blood leaves the capillaries, it enters
the
A.	arteries.
B.	arterioles.
C.	capillaries.
D.	venules.
E.	veins.

Answer 17

D. venules.

Question 18

Branches of the popliteal artery include
the
A.	femoral artery.
B.	peroneal artery.
C.	iliac artery.
D.	dorsalis pedis.
E.	plantar arch.

Answer 18

B. peroneal artery.

Question 19

Increased levels of carbon dioxide in the
blood will result in decreased
A. heart rate.
B. cardiac output.
C. blood flow to the lungs.
D. parasympathetic stimulation of the heart.
E. none of the above

Answer 19

D. parasympathetic stimulation of the heart.

Question 20

When a person rises quickly from a prone
position,
A. the carotid baroreceptors become less active.
B. venous return is increased.
C. reflex vasoconstriction of peripheral blood
vessels occurs.
D. heart rate decreases.
E. the cardioaccelerator center in the medulla
becomes less excited.

Answer 20

C. reflex vasoconstriction of peripheral blood

vessels occurs.