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Study Guide 7.8: CIRCULATORY SYSTEM

True/False: Indicate whether the statement is true or false.
 

 1. 

The lower part of the septum is called the interatrial septum.
 

 2. 

The double-layered membrane that covers the outside of the heart is the endocardium.
 

 3. 

The period of ventricular contraction in the heart is called diastole.
 

 4. 

During diastole, the atria are filling with blood and the ventricles contract.
 

 5. 

Electrical impulses originating in the heart cause the cyclic contraction of the muscles.
 

 6. 

The movement of the electrical impulse in the heart can be used to detect abnormal activity or disease.
 

 7. 

The smallest branches of arteries are called arterioles.
 

 8. 

Capillaries have thin walls containing only one layer of cells.
 

 9. 

Capillaries allow oxygen and nutrients to pass through to body cells.
 

 10. 

Fibrinogen and prothrombin are blood proteins necessary for the clotting of blood.
 

 11. 

Plasma is approximately 75 percent water with many suspended substances.
 

 12. 

Hemoglobin carries both oxygen and carbon dioxide.
 

 13. 

Phagocytosis is a process by which erythrocytes destroy pathogens or germs.
 

 14. 

Hypotension is high blood pressure.
 

 15. 

Aplastic anemia is a result of injury to or destruction of the bone marrow.
 

 16. 

Arteriosclerosis is a ballooning out of, or saclike formation on, an artery wall.
 

 17. 

An embolus is a foreign substance circulating in the bloodstream.
 

 18. 

A common symptom of a myocardial infarction is a severe, crushing pain that radiates to the arm, neck, and jaw.
 

 19. 

Leukemia is a malignant disease of the blood vessels that destroys white blood cells.
 

 20. 

Sickle cell anemia is a chronic, inherited anemia that occurs almost exclusively among African Americans.
 

 21. 

Arrhythmias are abnormal heart rhythms and can be mild to life threatening.
 

 22. 

Fixed pacemakers deliver electrical impulses only when the heart’s own conduction system is not responding correctly.
 

 23. 

Neutrophils, monocytes, thrombocytes, and lymphocytes are all different types of leukocytes.
 

 24. 

Angioplasty may be used to remove or compress deposits in arteries, or to insert a stent to allow blood flow.
 

 25. 

If hypertension is not treated, it can cause permanent damage to the heart, blood vessels, and kidneys.
 

 26. 

Even though the heart weighs less than one pound, it pumps approximately 2,000 gallons of blood through the body each day.
 

Multiple Choice: Identify the choice that best completes the statement or answers the question.
 

 1. 

The muscle layer of the heart is the ____.
A
endocardium
C
ectocardium
B
pericardium
D
myocardium
 

 2. 

The chamber of the heart that receives deoxygenated blood as it returns from body cells is the ____.
A
right atrium
C
left atrium
B
right ventricle
D
left ventricle
 

 3. 

The chamber of the heart that receives oxygenated blood as it returns from the lungs is the ____.
A
right atrium
C
left atrium
B
right ventricle
D
left ventricle
 

 4. 

The valve between the right atrium and right ventricle that prevents blood from flowing back into the right atrium is the ____.
A
tricuspid valve
C
aortic valve
B
pulmonary valve
D
mitral valve
 

 5. 

The valve between the left atrium and left ventricle that prevents blood from flowing back into the left atrium is the ____.
A
tricuspid valve
C
aortic valve
B
pulmonary valve
D
mitral valve
 

 6. 

The blood vessels that carry blood away from the heart are the ____.
A
arteries
C
venules
B
veins
D
capillaries
 

 7. 

The blood vessels that contain valves to prevent blood from flowing in a backward direction are the ____.
A
arteries
C
capillaries
B
veins
D
arterioles
 

 8. 

The blood vessels that are more muscular and elastic than are the other blood vessels are the ____.
A
arterioles
C
capillaries
B
venules
D
arteries
 

 9. 

How much blood does the average adult have in his or her body?
A
2 to 4 quarts
C
6 to 8 pints
B
4 to 6 quarts
D
3 to 4 gallons
 

 10. 

The largest artery in the body is the ____.
A
carotid
C
aorta
B
femoral
D
coronary
 

 11. 

Which of the following blood proteins does not aid in clotting?
A
hemoglobin
C
prothrombin
B
fibrinogen
D
none of the above
 

 12. 

The blood cells that contain hemoglobin are the ____.
A
leukocytes
C
erythrocytes
B
platelets
D
thrombocytes
 

 13. 

The number of erythrocytes in one cubic millimeter of blood is ____.
A
250,000 to 400,000
C
4.5 to 5.5 million
B
5,000 to 9,000
D
25 trillion
 

 14. 

The bright red color of blood indicates ____.
A
anemia
C
hemoglobin-carrying oxygen
B
venous blood
D
fibrinogen-carrying oxygen
 

 15. 

The blood cells that fight infection are the ____.
A
erythrocytes
C
thrombocytes
B
leukocytes
D
platelets
 

 16. 

A normal thrombocyte count per cubic millimeter of blood is ____.
A
100,000 to 200,000
C
300,000 to 500,000
B
250,000 to 400,000
D
450,000 to 550,000
 

 17. 

Which of the following is not true of thrombocytes?
A
Thrombocytes lack a nucleus.
B
Thrombocytes vary in shape and size.
C
Thrombocytes are required for the clotting process.
D
Thrombocytes fight infection.
 

 18. 

An inherited disease that occurs almost exclusively in males and in which the blood is unable to clot is ____.
A
anemia
C
hemophilia
B
leukemia
D
aneurysm
 

 19. 

An inflammation of a vein with the formation of a clot is ____.
A
phlebitis
C
embolus
B
thrombophlebitis
D
varicose veins
 

 20. 

The leukocytes that provide immunity for the body by developing antibodies and protect against the formation of cancer cells are ____.
A
neutrophils
C
basophils
B
lymphocytes
D
eosinophils
 

 21. 

Dilated, swollen veins that have lost elasticity and cause stasis, or decreased blood flow, are called ____.
A
phlebitis
C
varicose
B
aneurysm
D
emboli
 

 22. 

Which of the following is not a risk factor that increases the incidence of hypertension?
A
race
C
excessive exercise
B
smoking
D
obesity
 

 23. 

Which acid is required for the development of mature erythrocytes?
A
folic acid
C
muriatic acid
B
hydrochloric acid
D
sulfuric acid
 

 24. 

A normal leukocyte count per cubic millimeter of blood is ____.
A
5,000 to 9,000
C
250,000 to 400,000
B
10,000 to 20,000
D
4,500,000 to 5,500,000
 

Short Answer
 

 1. 

Trace a drop of blood through the heart, to the lungs, and back to the heart. Name the blood vessels carrying the blood, the valves, and all chambers of the heart.
 

 2. 

Trace the pathway of the electrical impulse in the heart, listing all parts of the pathway in the correct order.
 

 3. 

Name five things that blood transports through the body.
 

 4. 

What is the disease that occurs when fatty plaques are deposited on the walls of arteries?
 

 5. 

List three treatments that can be used to control hypertension.
 

Matching
 
 
Label the following diagram of the heart.
grp001-1.jpg
 

 1. 

Pericardium
 

 2. 

Myocardium
 

 3. 

Endocardium
 

 4. 

Septum
 

 5. 

Superior Vena Cava
 

 6. 

Inferior Vena Cava
 

 7. 

Right atrium
 

 8. 

Tricuspid Valve
 

 9. 

Right Ventricle
 

 10. 

Pulmonary Valve
 

 11. 

Pulmonary Arteries
 

 12. 

Pulmonary Veins
 

 13. 

Left Atrium
 

 14. 

Mitral or Bicuspid valve
 

 15. 

Left Ventricle
 

 16. 

Aortic Valve
 

 17. 

Aorta
 



 
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