Name: 
 

7th Grade Science Review



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

 1. 

Another name for high blood pressure is ______.
a.
atherosclerosis
c.
leukemia
b.
hypertension
d.
thrombosis
 

 2. 

Blood in veins is ______.
a.
high in oxygen
c.
low in wastes
b.
high in nutrients
d.
low in oxygen
 

 3. 

In pulmonary circulation, blood flows through two organs, the ______.
a.
brain and heart
c.
heart and liver
b.
heart and kidneys
d.
lungs and heart
 

 4. 

In systemic circulation, blood returns from your abdomen through the inferior vena cava to the ______.
a.
left atrium
c.
right atrium
b.
left ventricle
d.
right ventricle
 

 5. 

Coronary circulation is the flow of blood to the tissues of the ______.
a.
brain
c.
kidneys
b.
heart
d.
lungs
 

 6. 

When blood moves from an atrium to a ventricle, it must pass through a ______.
a.
one-way valve
c.
semilunar valve
b.
murmur
d.
lymph node
 

 7. 

______, the liquid part of blood, is mostly made of water.
a.
Hemoglobin
c.
Plasma
b.
Lymph
d.
Platelets
 

 8. 

Hemoglobin picks up ______.
a.
carbon dioxide and oxygen
b.
carbon dioxide and wastes
c.
nutrients and carbon dioxide
d.
oxygen and wastes
 

 9. 

______ help clot blood.
a.
Lymph nodes
c.
Red blood cells
b.
Platelets
d.
White blood cells
 

 10. 

______ is the water and dissolved substances not taken in by cells that remains between the cells.
a.
Hemoglobin
c.
Plasma
b.
Lymph
d.
Thymus
 

 11. 

Anemia is a disorder where there are too few ______ in the blood.
a.
lymphocytes
c.
red blood cells
b.
platelets
d.
white blood cells
 

 12. 

Leukemia is a disease in which ______ are produced in great numbers.
a.
lymphocytes
c.
red blood cells
b.
platelets
d.
white blood cells
 

 13. 

The ______ fight bacteria and viruses.
a.
platelets
c.
red blood cells
b.
hemoglobin molecules
d.
white blood cells
 

 14. 

______ diseases are spread by water, air, food, contact, and by organisms.
a.
Infectious
c.
Noninfectious
b.
Antibody
d.
Lister
 

 15. 

______, an English surgeon, recognized the relationship between the death rate and the degree of cleanliness in surgery in the 1800s.
a.
Jenner
c.
Lister
b.
Koch
d.
Salk
 

 16. 

All of the following are true of allergies EXCEPT ______.
a.
dust is an allergen for some
b.
reactions include watery eyes
c.
most reactions are not serious
d.
body produces antihistamines
 

 17. 

All of the following are true of immunities EXCEPT ______.
a.
newborns have passive immunity
b.
immunities build as you grow older
c.
vaccines create active immunities
d.
passive immunity lasts many years
 

 18. 

All of the following are true of cancer EXCEPT ______.
a.
it results from uncontrolled cell growth
b.
cancer cells do not function normally
c.
its cells travel in the body
d.
a disease since the eighteenth century
 

Completion
Complete each statement.
 
 
Complete the following sentences using the vocabulary words listed below.

arteriescapillarieshemoglobinveins
lymphplasmaplateletes
 

 19. 

The blood vessels that move blood away from the heart are called ____________________.
 

 

 20. 

The blood vessels that move blood in the direction of the heart are called ____________________.
 

 

 21. 

____________________ are microscopic blood vessels that connect arteries and veins.
 

 

 22. 

____________________ is the liquid part of blood and is made mostly of water.
 

 

 23. 

Red blood cells contain ____________________, a chemical that can carry oxygen and carbon dioxide.
 

 

 24. 

____________________ are the odd-shaped cell fragments that help clot blood.
 

 

 25. 

Tissue fluid found inside lymphatic capillaries is known as ____________________.
 

 

 26. 

immunity that occurs when a body makes its own antibodies ____________________
 

 

 27. 

protein made in response to a specific antigen ____________________
 

 

 28. 

immunity that occurs when antibodies come from another source ____________________
 

 

 29. 

method of using heat to kill most bacteria in food ____________________
 

 

 30. 

diseases that are long-lasting and non-infectious ____________________
 

 

 31. 

substances foreign to the body ____________________
 

 

 32. 

substance that causes an allergic reaction ____________________
 

 

 33. 

diseases that cannot be spread ____________________
 

 

 34. 

diseases that are spread by water, air, food, contact, and vectors ____________________
 

 
 
List whether the following diseases are caused by bacteria or viruses.
 

 35. 

strep throat ____________________
 

 

 36. 

measles ____________________
 

 

 37. 

influenza ____________________
 

 

 38. 

diphtheria ____________________
 

 

 39. 

mumps ____________________
 

 

 40. 

chicken pox ____________________
 

 

 41. 

tetanus ____________________
 

 

 42. 

hepatitis ____________________
 

 

Short Answer
 

 43. 

List three diseases caused by viruses.
 

 44. 

List three diseases caused by bacteria.
 

 45. 

List five noninfectious diseases.
 

 46. 

What is the significance of Koch’s rules?
 

 47. 

Explain the natural defenses your body has against disease.
 

 48. 

Complete the paragraph by filling in the blanks.

Your a)____ is made up of cells, tissues, organs, and body system that fight foreign organisms. b)____ is a barrier that prevents many pathogens from entering the body.
Your circulatory system contains c)____ blood cells that surround and digest foreign organisms and chemicals as they enter the body. When tissue is damaged by infection, it becomes d)____.
Your respiratory system has e)____ and mucus in the nose and throat to trap pathogens. When you f)____ you expel pathogens. In the digestive system, g)____ in your mouth, stomach, pancreas, and h)____ destroy pathogens. i)____ in your stomach kills bacteria that enter your body on the food that you eat. When you do get sick, your body has defenses in the form of j)____ and k)____ immunity.
 

 49. 

Descriptions of the number of cells per cubic millimeter and two other facts about blood cell types are listed in the table. Complete the following table by identifying the cell type next to its description.

Types of blood cells
1.5 million per 1 mm3; live 120 days; contain hemoglobin
2.5-10 thousand per 1 mm3; live 30 days; ingest dead cells
3.400 thousand per 1 mm3; live 5-9 days; odd-shaped fragments
 

 50. 

Place the following events in the systemic system in the correct order beginning where blood oxygen is highest.

1.      Food and oxygen diffuse from the capillaries to body tissues.
2.      Blood enters the heart through the inferior vena cava to the right atrium.
3.      Blood leaves the left ventricle through the aorta.
4.      Blood travels to smaller arteries and capillaries in the abdomen.
 

 51. 

Compare the lymphatic and circulatory systems by completing the following phrases using the words listed below. Some words may not be used.

blood
thymus
one
four spleen
lymph
sponge
white
platelets
brain
heart
lungs
lymph nodes
liver
red
skeletal
pump two

Circulatory system

Major organs: heart, which functions like a 1.________, and 2. ________
Has hemoglobin in 3. ________ blood cells and 4. ________ for clotting

Lymphatic system

Returns fluids to 5. ________
Has lymphocytes, a type of 6. ________ blood cell
Has 7. ________ for filtering
 
 
Using your knowledge of blood types (A, B, AB, and O), answer the following questions.
 

 52. 

List the blood type(s) that someone with type O blood can safely receive.
 

 53. 

List the blood type(s) that someone with type O blood can safely donate to.
 

 54. 

List the blood type(s) that someone with type AB blood can safely donate to.
 



 
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