Question 1

Which of the following is not a complement activation pathway?

Accepted Answer

A)  lectin pathway
B)  alternative pathway
C)  lactate pathway
D)  classical pathwayE) A) and B)
F) C) and D)

Question 2

Which statement is true about T cells?

Accepted Answer

A)  They will develop into cytotoxic T cells if antigen is complexed with class II MHC proteins.
B)  Once activated,they cannot secrete cytokines.
C)  Their proliferation is enhanced by interleukins 1 and 2.
D)  They usually directly recognize antigens,which then activates a subpopulation of killer cells.E) None of the above
F) B) and C)

Question 3

An advantage of innate immunity is ________.

Accepted Answer

A)  its barriers that prevent pathogens from entering into the body
B)  the use of antibodies to cause cell lysis and kill invading cells
C)  the numerous steps in the activation of its cells that can prevent autoimmune disease
D)  the specificity of its individual cells which specialize in the removal on one type of antigenE) B) and D)
F) A) and B)

Question 4

Which of the following best describes the qualities of most antigens?

Accepted Answer

A)  macromolecules that are produced by the host organism
B)  atomic elements that are not normally present in the human body
C)  macromolecules that are foreign to the host
D)  atomic elements that are harmful or toxicE) A) and D)
F) None of the above

Question 5

Phagocyte mobilization involves ________.

Accepted Answer

A)  monocytes as the most active phagocyte
B)  diapedesis,during which cells line up against the capillary wall
C)  mainly neutrophil and macrophage migration into inflamed areas
D)  margination,which is the process of white cell movement through the walls of capillaries into injured tissuesE) A) and C)
F) A) and D)

Question 6

The directional movement of cells in response to chemicals is called chemotaxis.

Accepted Answer

A) True 
 B)False

Question 7

Fever ________.

Accepted Answer

A)  production is regulated by chemicals that reset the body's thermostat to a higher setting
B)  decreases the metabolic rate of the body to conserve energy
C)  is a higher-than-normal body temperature that is always dangerous
D)  causes the liver to release large amounts of iron,which seems to inhibit bacterial replicationE) A) and C)
F) None of the above

Question 8

A flu vaccine is needed seasonally to be effective but a polio vaccine is only needed once.The best explanation of this is ________.

Accepted Answer

A)  the flu vaccine is substantially weaker than the polio vaccine
B)  exposure to flu vaccine produces no memory cells from proliferating B-lymphocytes
C)  the polio virus is substantially weaker than the flu virus
D)  the flu has several strains that change seasonallyE) A) and B)
F) B) and D)

Question 9

Cancer cells and virus-infected body cells can be killed before activation of adaptive immunity by ________.

Accepted Answer

A)  B lymphocytes
B)  T lymphocytes
C)  pinocytosis
D)  natural killer cellsE) A) and B)
F) C) and D)

Question 10

Select the best description of the negative selection process of lymphocyte maturation.

Accepted Answer

A)  removal of lymphocytes that fail to recognize "self" cells
B)  teaching a lymphocyte to recognize "self" from foreign antigens
C)  removal of lymphocytes that react with "self" cells
D)  allowing the survival of lymphocytes that cannot bind to MHC proteinsE) C) and D)
F) B) and D)

Question 11

The most common type of immediate hypersensitivity is ________.

Accepted Answer

The answer of The most common type of immediate hypersensitivity...

Question 12

Plasma cells ________.

Accepted Answer

A)  have a great deal of rough endoplasmic reticulum reflecting the fact that they secrete a tremendous amount of protein (antibody) 
B)  are small so that they slip between endothelial cells of capillaries to fight infection in the surrounding tissues
C)  have a great deal of rough endoplasmic reticulum to dispose of ingested pathogens
D)  are large so that they can envelope their prey by phagocytosisE) None of the above
F) All of the above

Question 13

Natural killer (NK) cells ________.

Accepted Answer

A)  can kill cancer cells before the immune system is activated
B)  are also called cytotoxic T cells
C)  are cells of the adaptive immune system
D)  are a type of phagocyteE) A) and B)
F) All of the above

Question 14

Pure antibody preparations specific for a single antigenic determinant are called ________ antibodies.

Accepted Answer

The answer of Pure antibody preparations specific for a single...

Question 15

B lymphocytes develop immunocompetence in the ________.

Accepted Answer

A)  bone marrow
B)  lymph nodes
C)  thymus
D)  spleenE) C) and D)
F) A) and C)

Question 16

Which of the following does not describe actions of interferon (IFN) ?

Accepted Answer

A)  IFN binds to normal,uninfected cells stimulating the activation of genes that produce anti-viral proteins.
B)  IFN can penetrate the viral capsid and destroy the virus.
C)  Virally infected cells can release interferon which attracts NK cells to attack and kill the IFN secreting cell.
D)  IFN will attract macrophages to the secreting cell to be removed by phagocytosis.E) None of the above
F) All of the above

Question 17

Tom gets a cut on his hand.After several days he notes swelling,pain,heat,and redness.Upon opening the wound to relieve the pressure,the presence of pus is noted.What has happened to the wound?

Accepted Answer

The wound has become infected,probably w...

Question 18

The antibody that becomes bound to mast cells and basophils and causes the cells to release histamine and other chemicals is ________.

Accepted Answer

The answer of The antibody that becomes bound to mast...

Question 19

Fever is often a beneficial immune response because it can speed the activities of leucocytes.

Accepted Answer

A) True 
 B)False

Question 20

The primary immune response ________.

Accepted Answer

A)  has a lag period while B cells proliferate and differentiate into plasma cells
B)  is another name for immunological memory
C)  occurs more rapidly and is stronger than the secondary response
D)  occurs when memory cells are stimulatedE) B) and D)
F) B) and C)

Exam 21: The Immune System: Innate and Adaptive Body Defenses

Tom gets a cut on his hand.After several days he notes swelling,pain,heat,and redness.Upon opening the wound to relieve the pressure,the presence of pus is noted.What has happened to the wound?

Correct AnswerverifiedThe wound has become infected,probably w...View AnswerShow Answer

Which statement is true about T cells?

Correct AnswerverifiedShow Answer

The antibody that becomes bound to mast cells and basophils and causes the cells to release histamine and other chemicals is ________.

Correct AnswerverifiedShow Answer

The directional movement of cells in response to chemicals is called chemotaxis.

Correct AnswerverifiedShow Answer

B lymphocytes develop immunocompetence in the ________.

Correct AnswerverifiedShow Answer

The primary immune response ________.

Correct AnswerverifiedShow Answer

Fever ________.

Correct AnswerverifiedShow Answer

Plasma cells ________.

Correct AnswerverifiedShow Answer

Which of the following does not describe actions of interferon (IFN) ?

Correct AnswerverifiedShow Answer

Cancer cells and virus-infected body cells can be killed before activation of adaptive immunity by ________.

Correct AnswerverifiedShow Answer

Select the best description of the negative selection process of lymphocyte maturation.

Correct AnswerverifiedShow Answer

An advantage of innate immunity is ________.

Correct AnswerverifiedShow Answer

Pure antibody preparations specific for a single antigenic determinant are called ________ antibodies.

Correct AnswerverifiedShow Answer

Which of the following best describes the qualities of most antigens?

Correct AnswerverifiedShow Answer

Phagocyte mobilization involves ________.

Correct AnswerverifiedShow Answer

Fever is often a beneficial immune response because it can speed the activities of leucocytes.

Correct AnswerverifiedShow Answer

Which of the following is not a complement activation pathway?

Correct AnswerverifiedShow Answer

A flu vaccine is needed seasonally to be effective but a polio vaccine is only needed once.The best explanation of this is ________.

Correct AnswerverifiedShow Answer

Natural killer (NK) cells ________.

Correct AnswerverifiedShow Answer

The most common type of immediate hypersensitivity is ________.

Correct AnswerverifiedShow Answer

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The wound has become infected,probably w...
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