AnswersBiologyThe Immune System

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1
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Vaccination is a process of injecting a dead or weakened form of a pathogen into the body. How does this help strengthen the immune system?

A
It allows the body to increase its internal temperature.
B
It allows the body to regulate the inflammatory response.
C
It allows the body to keep pathogen information for future infections.
D
It allows the body to increase its desire to eat healthy food.
2
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What do saliva, tears, and nasal mucus have in common?

A
All contain Langerhans cells.
B
All are part of the complement system.
C
All can be classified as biological barriers.
D
All can destroy bacterial cell walls.
3

One function of the immune system is to attack the foreign cells to protect the body. In organ transplants, the body recognizes that the new organ is made of foreign cells. What kind of medicine would you give a patient to increase the chances of transplant success?

A
Medicine that allows the immune system to produce and secrete hormones.
B
Medicine that makes the immune system less effective.
C
Medicine that makes the immune system more effective.
D
Medicine that allows the immune system to regulate nerve responses.
6

Why is the action of phagocytes considered a nonspecific response?

A
It does not respond to any specific type of hormone.
B
It is not involved with the production of any specific type of lymphocyte.
C
It does not occur at any specific temperature.
D
It is not a response to a specific type of pathogen.
7

Which are correct examples of physical (P), chemical (C), and biological (B) barriers?

A
P: complement system; C: saliva; B: sneezing
B
P: complement system; C: saliva; B: coughing
C
P: coughing; C: sneezing; B: complement system
D
P: coughing; C: saliva; B: complement system
8

What is the difference between B-cell lymphocytes and T-cell lymphocytes?

A
B cells are produced in the thymus, and T cells are produced in the bone marrow.
B
B cells regulate blood pH, and T cells regulate body temperature.
C
B cells produce antibodies, and T cells destroy infected cells.
D
B cells engulf bacteria, and T cells carry bacteria to the lymph nodes.
9

How does inflammation help the body fight off further infection?

A
Inflammation keeps harmful substances away from healthy cells.
B
Inflammation triggers the production of white blood cells.
C
Inflammation drops the pH of blood.
D
Inflammation raises the pH of blood.
10

Which type of barrier are coughing and sneezing?

A
biological
B
physical
C
mechanical
D
chemical

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