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Homework answers / question archive / 1
1. ________ function in humoral immunity, while ________ function in cellular immunity.
Group of answer choices
B cells, T cells
B cells, mast cells
monocytes, basophils
T cells, B cells
basophils, T cells
2. Lymphocytes that can attack foreign, tumor or virally infected cells are
Group of answer choices
cytotoxic T cells.
neutrophils.
plasma cells.
memory B cells.
helper T cells.
3. The specificity of an antibody for its antigen is due to the:
Group of answer choices
the light chain.
the variable portions of the heavy and light chains.
the disulfide bridges.
the constant portions of the heavy and light chains.
the heavy chain.
4. Match the antibody class with its best definition.
Group of answer choices ( IgA, IgG, IgE, IgM)
dimer secreted into nasal passages, tears, breast milk
80% of the human serum antibodies
largest in size; first antibody made in primary and secondary response
involved in allergic response
5. The binding of an immunoglobulin to a microbe can result in
Group of answer choices
opsonization.
neutralization.
All of the other answers can result from an immunoglobulin binding a microbe.
agglutination.
complement fixation.
6. The major histocompatibility complex is/are:
Group of answer choices
glycoproteins, called MHC receptors, found on all nucleated body cells.
located free-floating in the thymus gland.
series of genes that code for RBC receptors.
all of the other answers are correct
not recognized by the body's immune system.
7. Helper T cells are activated by antigen presented on:
Group of answer choices
MHC II
either MHC I and MHC II
MHC I
both MHC I and MHC II presenting the same antigen
8. ____________ is when antigens normally presented with MHC II are presented on MHC I for CD8 cytotoxic T cells.
Group of answer choices
class switching
clonal expansion
regulatory T cells
thymic selection
cross presentation
9. TCRs recognize epitopes made of which type of molecule?
Group of answer choices
nucleic acids
phospholipids
proteins
carbohydrates
Lipopolysaccharides
10. ________ are proteases made by CD8 CTLs that enter pores generated by perforins to induce apoptosis.
Group of answer choices
cytokines
superantigens
corticosteroids
granzymes
granules
11. Which bacterial pathogen species can produce superantigen to trigger toxic shock syndrome?
Group of answer choices
Yersinia
Staphylococcus
Escherichia
Clostridium
Listeria
12. All about B cells is correct except:
Group of answer choices
All other statements about B cells are correct.
They mature into antibody secreting cells after encountering their specific antigens.
They have B cell receptors on their surfaces.
They form naïve mature clones after their BCR recognizes its specific free antigens.
They originate in the bone marrow.
13. The secondary response of humoral immunity
Group of answer choices
depends on the activity of memory B cells.
All of the other statements are true
results in elevated titers (levels) of antibodies sooner than in the primary response.
produces antibodies have higher affinity for their epitopes
can occur even if the second exposure occurs years after the first one.
14. Which is the term for plasma B cells producing different antibody monomers with the same epitope specificity?
Group of answer choices
cross presentation
clonal expansion
maturation
regulation
class switching
15. Immunity resulting from a chicken pox infection is called
Group of answer choices
autoimmunity.
artificial active immunity.
natural passive immunity.
natural active immunity.
artificial passive immunization.
16. This class of vaccine is made from a capsule polysaccharide bound to a protein.
Group of answer choices
conjugate
toxoid
live attenuated
inactivated
subunit
17. All are types of allergens except:
Group of answer choices
ingestants
contactants
complement
inhalants
injectants
18. Excessive and damaging response of the immune system against an antigen is called:
Group of answer choices
artificial passive immunity
immunology
hypersensitivity
immune tolerance
immunodeficiencies
19. All are Type I Immediate Hypersensitivity conditions except:
Group of answer choices
contact dermatitis
hives
peanut allergy
hay fever
allergy-induced asthma
20. The serum of most people with blood type B, Rh- , who have never been pregnant or received a blood transfusion, will have which immunoglobulins?
Group of answer choices
anti - A, anti - Rh
anti - A
anti - A, anti - B, and anti - Rh
anti - B, anti - Rh
anti - B
21. What is a result of desensitization allergen shots?
Group of answer choices
keeps the plasma cells from synthesizing IgE
inhibits T cells from releasing perforins and granzymes
increase memory cells and IgG blocking antibody levels to bind allergen
are monoclonal drugs that inactivate IgE
counteract effects of a cytokines
22. All are immune system responses exhibited by most people except:
Group of answer choices
tuberculin response if previously infected with tuberculosis
blood type incompatibility
contact dermatitis caused by jewelry
contact dermatitis caused by poison ivy
rejection of incompatible tissue graft
23. All are true about Type III Hypersensitivities except:
Group of answer choices
complement gets activated
chronic inflammation causes damage in tissues and organs
cytotoxic T cells secrete cytokines to stimulate macrophages
antibodies form complexes with antigens
immune complexes become lodged in walls of blood vessels
24. Type I Hypersensitivity requires sensitization and degranulation.
Group of answer choices
True
False
25. Hemolytic transfusion reaction Type II Hypersensitivity normally requires sensitization.
Group of answer choices
True
False
26. Type IV Hypersensitivity requires sensitization and subsequent exposure to allergen.
Group of answer choices
True
False
27.Primary immunodeficiences can be caused by malnutrition
Group of answer choices
True
False
28. Which disease is based on lots of autoantibodies forming immune complexes with their antigen?
Group of answer choices
severe combined immunodeficiency
anaphylactic shock
rheumatoid arthritis
asthma
hemolytic disease of the newborn
