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SBI3UI
Name: __________________
Circulation Practice Test
True or False
___ The main difference between the open transport system in earthworms and the closed
transport system in insects is the presence of capillaries in insects.
___ A three-chambered heart is sufficient for amphibians because they are not large animals.
___ The three primary cycles in the mammalian circulatory system are the cardiac, pulmonary,
and capillary cycles.
___ In systemic circulation, venules deliver blood that is rich in oxygen to capillaries. Arterioles
transport blood that is low in carbon dioxide away from capillaries.
___ Arterial elasticity allows arteries to expand when a wave of blood passes through them, and
to snap back again when the wave has passed.
___ The sinoatrial node is a clump of specialized tissue that acts as a one-way valve. It prevents
blood from flowing the wrong way during the cardiac cycle.
Mix and Match
The Blood
A
___ i. the substance that is needed for blood clotting
___ ii. the liquid part of blood
___ iii. the substance that contains prothrombin
___ iv. the pigment in red blood cells that contains iron
___ v. the most numerous type of cell in blood
___ vi. an example of a phagocyte
B
a. plasma
b. macrophage
c. erythrocyte
d. platelets
e. antibody
f. pathogens
g. hemoglobin
h. fibrinogen
i. B cells
The Heart
A
___ i. the chamber from which blood flows into the aorta
___ ii. the chamber that pumps blood to the lungs
___ iii. the structure that sets the pace for the contraction and
relaxation of the heart
___ iv. the vessels that carry blood away from the heart
___ v. the vessel from which blood empties into the right atrium
___ vi. the vessel that delivers oxygenated blood to the cardiac
cells
B
a. superior vena cava
b. A-V node
c. coronary artery
d. left ventricle
e. right ventricle
f. arteries
g. septum
h. S-A node
i. venules
Fill-in-the-Blanks
1.
_______________________ are large, muscular vessels that carry blood away from the
heart.
2.
_______________________ are the tiniest blood vessels. They are the sites of gas, nutrient,
and waste exchange within tissues.
3.
A _______________________ _______________________ is a relatively common
congenital condition. It occurs when one or more heart valves do not open or close
properly.
4.
During ______________________, a small balloon is used to open an obstructed blood
vessel.
5.
An electrocardiogram is sensitive to changes in _______________________ that are
produced by S-A and A-V nodes.
6.
The _______________________ arteries carry oxygenated blood from the heart to the
head. The _______________________ veins carry deoxygenated blood from the head to
the heart.
7.
The series of one-way _______________________ in veins prevents blood from pooling.
Multiple Choice
Which statement about closed transport systems is correct?
A)
They lack arteries.
B)
They lack a heart.
C)
They lack veins.
D)
They require a network of vessels.
E)
They lack venules.
Which statement about white blood cells is correct?
A)
They engulf viruses.
B)
They produce antibodies.
C)
They scavenge dead cells.
D)
They engulf bacteria.
E)
They perform all of the preceding functions.
In mammals, where does blood that comes from the lungs enter the heart?
A)
through the aorta
B)
through the left atrium
C)
through the right atrium
D)
through the right ventricle
E)
through the left ventricle
What is one reason why venous blood returns to the heart?
A)
the pressure of the blood in the arteries
B)
the negative pressure created by the atria
C)
the pressure of the skeletal muscles on veins and their valves
D)
gravity
E)
the constriction of capillaries
Where is blood pressure the highest?
A)
in the arteries
B)
in the arterioles
C)
in the capillaries
D)
in the venules
E)
in the veins
A doctor who is listening to your heart hears a “lub-dub, lub-dub” sound. What does this sound
represent?
A)
successive heart valves closing
B)
a clogged coronary artery supplying the heart
C)
contraction of the ventricular cardiac muscle
D)
high blood pressure
E)
a defective pacemaker
Which of the following is not a function of the circulatory system?
A)
fighting disease
B)
producing mucus
C)
moving wastes
D)
maintaining body temperature
E)
transporting nutrients
The S-A node generates an electrical impulse. Which statement about the electrical impulse is
correct?
A)
It comes from the right atrium, causing atrial contraction.
B)
It comes from the left ventricle, causing atrial contraction.
C)
It comes from the left atrium, causing ventricular contraction.
D)
It comes from the right ventricle, causing atrial contraction.
E)
It comes from the right atrium, causing ventricular relaxation.
Arterial walls are more elastic and muscular than venous walls. What do these properties allow
the arterial walls to do?
A)
to reduce the amount of interstitial fluid within connective tissue
B)
to increase the amount of circulating white blood cells
C)
to equalize the blood pressure throughout the arterial system
D)
to withstand the blood pressure created by the heart
E)
to ensure that the blood travels back to the heart via the venous system
Short Answer
1. Compare and contrast an open transport system and a closed transport system.
2. Over 80% of an average person's blood is contained in the systemic circulatory system.
Explain why.
3. Arteries transport oxygen-rich blood, and veins transport oxygen-poor blood. Identify the
exception to this rule.
4. The ratio 120/80 represents a healthy blood pressure. Explain what each number in the ratio
represents.
Diagram
Label the following parts of the heart.
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O