Question 1

Blood and lymph have the following in common EXCEPT

Accepted Answer

A)  nucleated cells. 
B)  proteins. 
C)  red blood cells. 
D)  none of these 
A)  nucleated cells. 
B)  proteins. 
C)  red blood cells. 
D)  none of these

Question 2

Which of the treatments listed below would be MOST effective for a patient with a genetic defect that causes severe combined immunodeficiency (SCID)?

Accepted Answer

A)  intravenous antibiotics 
B)  bone marrow transplant 
C)  multiple immunizations 
D)  repeated doses of antisera 
A)  intravenous antibiotics 
B)  bone marrow transplant 
C)  multiple immunizations 
D)  repeated doses of antisera

Question 3

The first defense cells that interact with a pathogen in the body are

Accepted Answer

A)  T cells. 
B)  macrophages. 
C)  B cells. 
D)  mast cells. 
A)  T cells. 
B)  macrophages. 
C)  B cells. 
D)  mast cells.

Question 4

Adaptive immune responses are directed at pathogen molecules called

Accepted Answer

A)  antigens. 
B)  antibodies. 
C)  T-cell receptors. 
D)  PAMP. 
A)  antigens. 
B)  antibodies. 
C)  T-cell receptors. 
D)  PAMP.

Question 5

Differentiate between T-cytotoxic (TC)cells and T-helper (TH)cells.

Accepted Answer

TC cells interact with an infected cell

Question 6

Superantigens produce a harmful immune response because

Accepted Answer

A)  they activate too many T cells, causing excessive inflammation and cell damage. 
B)  they initiate a type I allergic response resulting in excessive inflammation. 
C)  too many phagocytes are activated and destroy host tissue. 
D)  a strong immune response is necessary to protect the host from the pathogen. 
A)  they activate too many T cells, causing excessive inflammation and cell damage. 
B)  they initiate a type I allergic response resulting in excessive inflammation. 
C)  too many phagocytes are activated and destroy host tissue. 
D)  a strong immune response is necessary to protect the host from the pathogen.

Question 7

People with aggamaglobulinemia do not make protective antibodies and suffer from recurrent,life threatening viral infections,but can develop normal immune responses to bacteria.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following are molecular mediators of inflammation?

Accepted Answer

A)  chemokines 
B)  cytokines 
C)  erythrocytes 
D)  both chemokines and cytokines 
A)  chemokines 
B)  cytokines 
C)  erythrocytes 
D)  both chemokines and cytokines

Question 9

A diagnostic test for M.tuberculosis exposure

Accepted Answer

A)  utilizes an inflammatory reaction that occurs if there has been previous exposure to M. tuberculosis antigens. 
B)  relies on previous tuberculin vaccination. 
C)  uses an antiserum to detect antibodies in the blood that are only formed if there has been previous exposure to M. tuberculosis antigens. 
D)  relies on an innate immune response that occurs only if there has been previous exposure to M. tuberculosis antigens. 
A)  utilizes an inflammatory reaction that occurs if there has been previous exposure to M. tuberculosis antigens. 
B)  relies on previous tuberculin vaccination. 
C)  uses an antiserum to detect antibodies in the blood that are only formed if there has been previous exposure to M. tuberculosis antigens. 
D)  relies on an innate immune response that occurs only if there has been previous exposure to M. tuberculosis antigens.

Question 10

Anticoagulants promote the clotting of blood.

Accepted Answer

A) True 
 B)False

Question 11

The rapid increase in adaptive immunity after a second antigen exposure is called

Accepted Answer

A)  immune memory. 
B)  specificity. 
C)  tolerance. 
D)  immune memory, specificity, or tolerance. 
A)  immune memory. 
B)  specificity. 
C)  tolerance. 
D)  immune memory, specificity, or tolerance.

Question 12

The ability of humans to resist a disease is called

Accepted Answer

A)  dormancy. 
B)  immunity. 
C)  resistance. 
D)  susceptibility. 
A)  dormancy. 
B)  immunity. 
C)  resistance. 
D)  susceptibility.

Question 13

Vaccines can be developed from synthetic peptides.

Accepted Answer

A) True 
 B)False

Question 14

Symptoms of delayed-type hypersensitivity may appear several hours to days after secondary exposure to the eliciting antigen.

Accepted Answer

A) True 
 B)False

Question 15

The unique antigen-reactive proteins of T cells are

Accepted Answer

A)  antibodies. 
B)  immunoglobins. 
C)  T cell receptors. 
D)  None of these is correct. 
A)  antibodies. 
B)  immunoglobins. 
C)  T cell receptors. 
D)  None of these is correct.

Question 16

Erythrocytes are the most numerous cells in human blood.

Accepted Answer

A) True 
 B)False

Question 17

All the following can cause contact dermatitis EXCEPT

Accepted Answer

A)  jewelry. 
B)  latex gloves. 
C)  poison ivy. 
D)  superantigens. 
A)  jewelry. 
B)  latex gloves. 
C)  poison ivy. 
D)  superantigens.

Question 18

A toxoid is an attenuated form of a toxin that retains both its antigenicity and toxicity.

Accepted Answer

A) True 
 B)False

Question 19

Why are secondary or "booster" reimmunizations given?

Accepted Answer

A)  Secondary immunizations are necessary for an innate immune response. 
B)  Secondary reimmunizations produce a secondary immune response and boost antibody titers. 
C)  Secondary reimmunizations produce a phagocytic immune response that is longer lasting than the primary immune response. 
D)  Frequent secondary reimmunizations are needed because the immune system doesn't remember antigens for more than a few years. 
A)  Secondary immunizations are necessary for an innate immune response. 
B)  Secondary reimmunizations produce a secondary immune response and boost antibody titers. 
C)  Secondary reimmunizations produce a phagocytic immune response that is longer lasting than the primary immune response. 
D)  Frequent secondary reimmunizations are needed because the immune system doesn't remember antigens for more than a few years.

Question 20

The cells active in both innate and adaptive immunity develop from common pluripotent precursors in the bone marrow called

Accepted Answer

A)  B cells. 
B)  killer cells. 
C)  stem cells. 
D)  leukocytes. 
A)  B cells. 
B)  killer cells. 
C)  stem cells. 
D)  leukocytes.

Exam 24: Immunity and Host Defense

Blood and lymph have the following in common EXCEPT

Which of the treatments listed below would be MOST effective for a patient with a genetic defect that causes severe combined immunodeficiency (SCID)?

The first defense cells that interact with a pathogen in the body are

Adaptive immune responses are directed at pathogen molecules called

Differentiate between T-cytotoxic (TC)cells and T-helper (TH)cells.

Superantigens produce a harmful immune response because

People with aggamaglobulinemia do not make protective antibodies and suffer from recurrent,life threatening viral infections,but can develop normal immune responses to bacteria.

Which of the following are molecular mediators of inflammation?

A diagnostic test for M.tuberculosis exposure

Anticoagulants promote the clotting of blood.

The rapid increase in adaptive immunity after a second antigen exposure is called

The ability of humans to resist a disease is called

Vaccines can be developed from synthetic peptides.

Symptoms of delayed-type hypersensitivity may appear several hours to days after secondary exposure to the eliciting antigen.

The unique antigen-reactive proteins of T cells are

Erythrocytes are the most numerous cells in human blood.

All the following can cause contact dermatitis EXCEPT

A toxoid is an attenuated form of a toxin that retains both its antigenicity and toxicity.

Why are secondary or "booster" reimmunizations given?

The cells active in both innate and adaptive immunity develop from common pluripotent precursors in the bone marrow called

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