Immune System and Antigens Quiz
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Questions and Answers

What are the two main branches of adaptive immunity?

Cell-mediated immunity and Antibody-mediated immunity

How do antibodies help neutralize extracellular bacteria?

By neutralization, activation of complement, opsonization, and phagocytosis

What immune response is effective against intracellular bacteria?

Phagocytosis, killing in the phagolysosome, and T CD4 helper type 1 response

How do viruses evade host immune responses?

<p>Through surface antigens variability, inhibition of innate immunity sensors, inhibition of MHC Class I presentation, and production of immunosuppressive cytokines</p> Signup and view all the answers

What are the key immune responses against helminths?

<p>T CD4 type 2 response, eosinophils, IgE, ADCC</p> Signup and view all the answers

What type of immunity involves neutralization by antibodies, activation of complement, opsonization, and phagocytosis against extracellular bacteria?

<p>Antibody-mediated immunity</p> Signup and view all the answers

Which immune response is effective against viruses through the production of type I interferons, NK cells, and T CD4 helper type 1 cells?

<p>Innate immunity</p> Signup and view all the answers

What immune response involves eosinophils, T CD4 type 2 cells, and IgE in combating helminths?

<p>Cell-mediated immunity</p> Signup and view all the answers

Which immune response relies on T CD8 CTL cells for killing intracellular bacteria in the phagolysosome?

<p>Cell-mediated immunity</p> Signup and view all the answers

What is a key mechanism by which viruses evade host immune responses?

<p>Inhibition of MHC Class I presentation</p> Signup and view all the answers

Which pathogen evasion mechanism involves tegument resistance to antibodies and complement or to CTL?

<p>Anatomic sequestration (cysts)</p> Signup and view all the answers

What is the nature of the invader that determines host immune responses against pathogens?

<p>Type of pathogen</p> Signup and view all the answers

Which type of immune response involves the production of IgM and IgG antibodies?

<p>Antibody-mediated immunity</p> Signup and view all the answers

What is the primary immune response against extracellular bacteria that leads to their neutralization?

<p>Activation of complement</p> Signup and view all the answers

Which immune response is effective against protozoa through phagocytosis and the action of T CD4 helper type 1 cells?

<p>Cell-mediated immunity</p> Signup and view all the answers

What is a key evasion mechanism used by viruses to avoid host immune responses involving mutations in surface antigens?

<p>Inhibition of MHC Class I presentation</p> Signup and view all the answers

Which immune response is effective against helminths through the action of eosinophils and IgE production?

<p>Antibody-mediated immunity</p> Signup and view all the answers

What response is effective against intracellular bacteria through phagocytosis and killing in the phagolysosome?

<p>Cell-mediated immunity</p> Signup and view all the answers

Which evasion mechanism do parasites use to resist antibodies and CTL, involving antigenic variability and masking?

<p>Anatomic sequestration</p> Signup and view all the answers

How do antibodies help combat extracellular bacteria?

<p>By activating complement</p> Signup and view all the answers

Which immune response is effective against fungi through phagocytosis, neutrophils, and inflammatory responses?

<p>Cell-mediated immunity</p> Signup and view all the answers

What mechanism do viruses use to inhibit innate immunity sensors (PRR) signaling as an evasion strategy?

<p>Production of analog to IL10 immunosuppressive cytokine</p> Signup and view all the answers

What are the key functions of MIP-1a, MCP-1, and RANTES in the immune system?

<p>Induce leukocyte migration and accumulation in inflammatory site</p> Signup and view all the answers

How has MIP-2 been functionally characterized in the immune system?

<p>As a major polymorphonuclear activating factor and chemoattractant</p> Signup and view all the answers

Which types of cells are targeted by a chemokine belonging to the CXC family?

<p>Monocytes, lymphocytes, basophils, and eosinophils</p> Signup and view all the answers

What is the role of chemokines from the CC family in immune responses?

<p>Inducing leukocyte migration and accumulation in inflammatory sites</p> Signup and view all the answers

What is the new nomenclature for the chemokine RANTES?

<p>Regulated upon Activation, Normal T cell Expressed and Secreted</p> Signup and view all the answers

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