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- Question 9 of 14 Which of the following acts as a signal for the dendritic cell to begin cross-presentation? Presence of self-reactive CD4 T cells O Expression of endoplasmic reticulum (ER) chaperones calnexin and calreticulin O Phagocytosis and processing of extracellular antigens O Cytokine release following the activation of engaged CD4 T cells Question 10 of 14 Which of the following are true about MHC class I and MHC class II peptide loading? Select all that apply. MHC class I peptide loading occurs in four steps. Peptide loading of class I molecules generated from intracellular proteins occurs in the endoplasmic reticulum. MHC class Il molecules are loaded before they are part of a vesicle capable of fusing with a phagolysosome. Peptide loading of class Il molecules occurs later in the secretory pathway than that of MHC class I molecules.Question 38 The constant region of each heavy chain determines the class of the heavy chain. Question 38 options: True False Question 39 The extensive variety of MHC proteins is apparent at a population level. Question 39 options: True False Question 40 the immunoglobulin sequences involved in antigen binding is situated in: Question 40 options: The constant region of the antibody The hyper-variable region of the antibody C terminal of the antibody Area close to disulfide bridgesQuestion 62 62. Host Defenses. Which cell makes antibodies? O cytotoxic T lymphocytes O helper T lymphocytes O B lymphocytes/plasma cells CD4+ T cells
- QUESTION 4 A person with agammaglobulinemia: cannot produce antibodies cannot produce interferons does not have functional cell-mediated immunity makes too many antibodiesQuestion 21 Fill in the blanks. Innate immunity and adaptive immunity has memory; is specific is nonspecific; has no memory is specific; has memory O is nonspecific; has memoryQuestion 27 The process responsible for the production of antibodies against allergens to ‘arm’ a mast cell is known as what? Question 27 options: Antigen processing Inflammation Sensitization Hyperreactivity
- QUESTION 3 Immunological memory explains which of the following? O The ability of a helper T cell to activate B cells The human body's ability to distinguish self from non-self O The observation that someone who had recovered from the plague could safely care for those who are newly diseased O The observation that some strains of the pathogen that causes Dengue fever casue more severe disease than othersQUESTION 2 Which statement best describes autoimmune diseases? A condition in which B and I cels trigger anaphylactic shock in response to an antigen A condition in which self molecules are treated as non-self A condition in which the adaptive immune system fails to recognize the second infection by the same pathogen A condition in which the immune system creates random antibodiesQuestion 2 II но Protein CH2OH CH;ČNH II HO CH2OH Но CH,OH OH OH IV Is the antigenic determinant reducing or non-reducing? reducing non-reducing both cannot be ascertained
- All of the following represent characteristic(s) of the adaptive immune system EXCEPT: O Populations of specific lymphocytes O Recognition of specific antigens/epitopes OLag time that is associated with illness All of the answers apply, no exception O Binding of pathogen with toll like receptors (TLRS) O Primary and secondary responsesIn what way do B cells differ from other B cells? Question 12 options: some B cells differentiate into killer T cells, whereas other B cells do not different B cells possess different antigen receptor proteins different B cells mature in different organs some B cells act against intracellular pathogens, while others act against extracellular pathogens some B cells are only involved in antibody-mediated immune responses, while others are also involved in cell-mediated immune responses some B cells lack a plasma membraneJane Doe is infected with HIV. One of her medications is acyclovir, which is a/an ____________________ drug used to treat viral infections or to provide temporary immunity.