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Circulatory (Cardiovascular) System Test – 8th Grade – Biology – Sunday
SC.912.L.14.36 - Describe the factors affecting blood flow through the cardiovascular system.
1. The rate at which blood flow through the human body changes in response to many factors. Which statement
describe one of these factors and its effect on blood flow?
a. A high viscosity of blood causes an increased resistance in the blood vessels and leads to slow blood flow
b. A low blood pH decreases the rate of diffusion through the blood vessels and leads to slow blood flow
c. The changing of the shape of the RBCs to a crescent shape increases resistance and leads to a faster
blood flow
d. The narrowing of blood vessels increases blood pressure and leads to a faster blood flow
2. Cardiovascular disease runs in Jim’s mother’s family. Jim is only 17 but knows that his mother and grandparents
all have high blood pressure. Which of the following best describes the connection between cardiovascular
disease and age?
a. As people age, their blood vessels become more elastic leading to less cardiovascular disease
b. As people age, the heart becomes more efficient with each pump, increasing cardiac output
c. As people age, blood pressure decreases leading to more cardiovascular disease
d. As people age, plaque builds up in the arteries increasing vessel resistance, which leads to disease
3. Jim was told that he might need to go on medication if his blood pressure continues to be high. What causes
blood pressure?
a. Cholesterol in the blood
c. Contraction of the ventricles in the heart
b. Stress that exercise puts on heart muscle
d. Removal of oxygen from the heart
4. The table below shows the average blood cholesterol levels of two patients along with the average range of
cholesterol levels:
Total Cholesterol Levels
Patient A
97 mg/dL
Patient B
225 mg/dL
Average Range 140-180 mg/dL
Using your knowledge of the cardiovascular system and the above data, which inference can most likely be
made about the cardiovascular systems of Patient A and B?
a. Patient B’s blood is quickly circulating through the cardiovascular system, resulting in high blood
pressure.
b. Patient A’s blood is quickly circulating through the cardiovascular system, resulting in high blood
pressure.
c. Patient B should increase salt intake to decrease blood volume to the average range
d. Patient A should hydrate with water to increase blood volume to the average range
5. Some disorders result in a drastic drop-off in the number of platelets in the blood. What effect would a low
“platelet count” have on the body?
a. A person with this disorder would become anemic
b. The risk of bleeding from a wound would increase
c. The body would not be able to fight off infectious diseases
d. The risk of stroke or heart attack would increase due to blood clots
6. A large piece of plaque breaks away from the inner wall of the artery in an otherwise healthy person. The artery
was part of the second loop in blood flow. Which part of the body would this dislodged plaque most likely affect
and how?
a. A narrow region of the superior vena cava could become blocked, restricting blood flow to the heart
b. A narrow vein in the brain could become blocked, restricting blood flow to the capillaries in the brain
c. A smaller artery in a lung could become blocked, restricting blood flow to capillaries in the lung
d. The right pulmonary artery could become blocked, restricting blood flow to the right lung
7. A doctor examines a patient who has high blood pressure and atherosclerosis in the coronary artery. What
medical condition connected to blood flow is most likely to affect this patient in the future?
a. The patient may develop headaches and confusion due to cancer in the brain caused by years of low
levels of oxygen supplied to the brain
b. The patient my develop stiff joints and chest pains from the high blood pressure applied to the muscle
and joint tissues of the body
c. The patient may show signs of confusion, weakness, and partial paralysis due to high blood pressure
when the plaque dislodges and blocks blood flow to the brain
d. The patient may suffer a heart attack because of the reduction in blood flow to the heart muscles due to
severe plaque build-up in the coronary artery
8. Which blood component transports vitamins and minerals?
a. Plasma
b. Platelet
c. RBCs
d. WBCs
9. Which blood type donor can give blood to a patient with type O blood?
a. A
b. B
c. O
d. AB
10. Which is the function of the circulatory system?
a. creation of vital organic compounds from oxygen and nutrients
b. excretion of toxic substances, excess water, and carbon dioxide
c. regulation of hormone, gas, and nutrient levels in the bloodstream
d. transportation of vital materials such as oxygen throughout the body
11. Which patient can receive blood from a donor with a B/Rh-positive blood type?
a. AB/Rhb. AB/Rh+
c. O/Rhd. O/Rh+
12. Which chamber does blood flow into once it has picked up a fresh supply of oxygen?
a. Left atrium
b. Right atrium
c. Left ventricle
d. Right ventricle
13. RBCs transport oxygen attached to which components?
a. Nuclei
b. Plasma membranes
c. Hemoglobin
d. Nitrogen
14. Where are one-way valves of the circulatory system located?
a. Arteries
b. Veins
c. Capillaries
d. Arterioles
15. A person is blood type A/Rh+. What blood types can she safely receive? A/Rh+, A/Rh-, O/Rh+, and O/Rh16. A cell fragment used to help form a blood clot is called a(n) __________platelet______________.
17. A patient with high blood pressure who frequently consumes high-cholesterol foods might develop
___________plaque______________.
18. Oxygen being passed from the blood to a bicep muscle cell is an example of _________diffusion________.
19. A diet high in fatty foods can lead to the condition known as ___________atherosclerosis______________.
20. Place a check in the correct box to identify the blood vessel each statement is describing. Answers may be
used more than once.
Statement
Smallest type of blood vessel
Has a thick wall to withstand the higher pressure
of blood being pumped from the heart
Carries blood away from the heart
Carries blood containing little oxygen
Wall only one cell thick
Artery
Capillary
Vein
1. Study the drawing of the heart. Identify the four chambers of the heart.
A – Right ventricle
B – Right atrium
C – Left ventricle
D – Left atrium
1. Differentiate between systole and diastole with how the terms relate to the measurement of blood pressure.
Systole (contraction of the heart leading to the highest point of the bp) and diastole (relaxation of the heart
allowing for the lowest level of the bp)
2 points
2. A patient comes to an emergency room and a blood test reveals that both his red and white blood cell counts
are low. Hypothesize an effect from a low white blood cell count and an effect from a low red blood cell count.
Low RBC count – inability to transport oxygen, muscle death
Low WBC count – inability to fight infections/diseases
2 points
3. An inactive adult has a resting pulse of 85 beats per minute. Infer the effect on her resting pulse after one year
if she starts running 32 kilometers a week. Explain.
Her resting heart rate would be lower after the year because her general health would be better and her heart
muscle would have better endurance
1 point
4. An accident patient is rushed to the emergency room of a hospital and needs blood. The patient is blood type
AB/Rh-. List the blood types of possible donors for this patient. A-, B-, AB-, O2 Points
5. Which blood types are considered the universal donor and the universal acceptor? Explain why they are
considered that?
Universal donor – O- because it contains no markers that would cause clumping
Universal acceptor – AB+ because it contains all the markers and would not clump
2 Points