Question 1

Cytokines are agents that affect neighboring cells without triggering systemic effects.

Accepted Answer

A) True 
 B)False

Question 2

Helper T-lymphocyte activation involves MHC class I, whereas cytotoxic T-lymphocyte activation involves MHC class II.

Accepted Answer

A) True 
 B)False

Question 3

The microglia of the brain are macrophages.

Accepted Answer

A) True 
 B)False

Question 4

Which class of major histocompatibility molecules is specific to antigen-presenting cells?

Accepted Answer

A)   MHC class I
B)   MHC class IIC) A) and B)
D) undefined

Question 5

Which type of cell responds to multiple antigens?

Accepted Answer

A)   Memory B-lymphocyte
B)   Memory T-lymphocyte
C)   Natural killer cell
D)   Plasma cell
E)   Cytotoxic T-lymphocyteF) A) and B)
G) None of the above

Question 6

The primary goal of the immune response is

Accepted Answer

A)   destruction or inactivation of pathogens and foreign material.
B)   maintenance of the proper ionic balance between lymph and blood.
C)   stimulation of mitotic activity in order to replace cells damaged by infection.
D)   reduction of the number of circulating memory lymphocytes.
E)   removal of antibodies from lymph and lymphatic organs.F) All of the above
G) A) and D)

Question 7

Helper T-lymphocytes are also known as

Accepted Answer

A)   cytotoxic T-lymphocytes.
B)   CD8+ cells.
C)   CD4+ cells.
D)   T8 cells.
E)   memory T-lymphocytes.F) B) and E)
G) C) and D)

Question 8

"Booster" shots are required following certain vaccinations because the memory B-lymphocytes produced in response to the initial vaccination don't survive indefinitely.

Accepted Answer

A) True 
 B)False

Question 9

Malaria is a disease caused by a

Accepted Answer

A)   multicellular parasite.
B)   protozoan.
C)   fungus.
D)   virus.
E)   bacterium.F) A) and C)
G) All of the above

Question 10

After maturation, T lymphocytes tend to remain in the same lymphatic structure for life.

Accepted Answer

A) True 
 B)False

Question 11

The clumping of foreign cells that occurs when antibodies cross-link their antigens is known as

Accepted Answer

A)   agglutination.
B)   neutralization.
C)   precipitation.
D)   opsonization.
E)   fixation.F) A) and E)
G) D) and E)

Question 12

"Mad cow disease" (variant Creutzfeldt-Jakob disease)  is caused by a

Accepted Answer

A)   fungus.
B)   protozoan.
C)   prion.
D)   virus.
E)   bacterium.F) All of the above
G) A) and B)

Question 13

Which type of cell produces and secretes antibodies?

Accepted Answer

A)   Memory B-lymphocyte
B)   Memory T-lymphocyte
C)   Natural killer cell
D)   Plasma cell
E)   Cytotoxic T-lymphocyteF) None of the above
G) D) and E)

Question 14

Acquired immunity is a system in which lymphocytes respond to particular antigens they encounter during a lifetime. Another name for acquired immunity is ________ immunity.

Accepted Answer

The answer of Acquired immunity is a system in which...

Question 15

Which type of cell attacks a variety of unwanted cells and causes those cells to undergo apoptosis?

Accepted Answer

A)   Natural killer cells
B)   Basophils
C)   Neutrophils
D)   Eosinophils
E)   MacrophagesF) C) and D)
G) B) and D)

Question 16

One way in which complement defends against bacteria is by binding to it and facilitating phagocytosis. This process is known as ________.

Accepted Answer

The answer of One way in which complement defends against...

Question 17

Cytotoxic T-lymphocytes destroy infected cells by releasing

Accepted Answer

A)   antibodies.
B)   bradykinin and histamine.
C)   perforin and granzymes.
D)   CD4+.E) A) and B)
F) A) and C)

Question 18

Fungi are

Accepted Answer

A)   eukaryotic cells with a cell wall.
B)   prokaryotic cells.
C)   multicellular parasites that reside within a host.
D)   protozoans lacking a cell wall.
E)   viruses that are fragments of infectious proteins.F) None of the above
G) A) and E)

Question 19

Upon activation, a T-lymphocyte

Accepted Answer

A)   ceases dividing and becomes a plasma cell.
B)   ceases dividing and becomes a memory cytotoxic helper cell.
C)   proliferates to form clones and memory cells.
D)   proliferates to form B cells and plasma cells.E) A) and B)
F) B) and C)

Question 20

Both active and passive immunity can be acquired though natural or artificial means.

Accepted Answer

A) True 
 B)False

Exam 22: Immune System and the Bodys Defense

"Mad cow disease" (variant Creutzfeldt-Jakob disease) is caused by a

Correct AnswerverifiedShow Answer

Fungi are

Correct AnswerverifiedShow Answer

After maturation, T lymphocytes tend to remain in the same lymphatic structure for life.

Correct AnswerverifiedShow Answer

The microglia of the brain are macrophages.

Correct AnswerverifiedShow Answer

The clumping of foreign cells that occurs when antibodies cross-link their antigens is known as

Correct AnswerverifiedShow Answer

Helper T-lymphocytes are also known as

Correct AnswerverifiedShow Answer

"Booster" shots are required following certain vaccinations because the memory B-lymphocytes produced in response to the initial vaccination don't survive indefinitely.

Correct AnswerverifiedShow Answer

Which type of cell attacks a variety of unwanted cells and causes those cells to undergo apoptosis?

Correct AnswerverifiedShow Answer

Acquired immunity is a system in which lymphocytes respond to particular antigens they encounter during a lifetime. Another name for acquired immunity is ________ immunity.

Correct AnswerverifiedShow Answer

Both active and passive immunity can be acquired though natural or artificial means.

Correct AnswerverifiedShow Answer

Helper T-lymphocyte activation involves MHC class I, whereas cytotoxic T-lymphocyte activation involves MHC class II.

Correct AnswerverifiedShow Answer

Which type of cell responds to multiple antigens?

Correct AnswerverifiedShow Answer

Cytotoxic T-lymphocytes destroy infected cells by releasing

Correct AnswerverifiedShow Answer

Cytokines are agents that affect neighboring cells without triggering systemic effects.

Correct AnswerverifiedShow Answer

Malaria is a disease caused by a

Correct AnswerverifiedShow Answer

Upon activation, a T-lymphocyte

Correct AnswerverifiedShow Answer

Which type of cell produces and secretes antibodies?

Correct AnswerverifiedShow Answer

The primary goal of the immune response is

Correct AnswerverifiedShow Answer

One way in which complement defends against bacteria is by binding to it and facilitating phagocytosis. This process is known as ________.

Correct AnswerverifiedShow Answer

Which class of major histocompatibility molecules is specific to antigen-presenting cells?

Correct AnswerverifiedShow Answer

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