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- 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 22 Which is described as the faster response to infection, when one is immune? O primary response secondary response O autoimmune response O tertiary responseQuestion 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 memory
- QUESTION 4 Which of the following is required for activation of the adaptive immune system? O Activation of complement proteins O Inflammation O Memory cells O Presentation of antigenQUESTION 4 Explain the events of inflammation process in animal immune system.Class I major histocompatibility complex molecules are found on O all anucleated cells. O antigen-presenting O all nucleated O None of the choices are correct. QUESTION 67 Important characteristics of antimicrobic drugs include O readily delivered to the site of infection. O high toxicity against microbial cells. O remains active in body tissues and fluids. do not cause serious side effects in humans. O All of these choices are correct. QUESTION 68 Antibodies O can bind to an immunogen. O are part of the nonspecific immune response. O can target the immunogen for destruction. O both can bind to an immunogen and can target the immunogen for destruction. O both can bind to an immunogen and are part of the nonspecific immune response.
- Question 39 Which antibody rises in this graph. PRIMARY IMMUNE RESPONSE Antibody concentration First antigen 1 exposure 4. Time (weeks) O IgE IgG O IgA IgD O IgM Antibody concentration In plasmaQUESTION 4 A person with agammaglobulinemia: cannot produce antibodies cannot produce interferons does not have functional cell-mediated immunity makes too many antibodiesQuestion 18 sponse. Interferons are produced by O all healthy cells to prevent viral infection. O virus infected cells. O bacterial infected cells. O all healthy cells to prevent bacterial infection.
- Question 62 62. Host Defenses. Which cell makes antibodies? O cytotoxic T lymphocytes O helper T lymphocytes O B lymphocytes/plasma cells CD4+ T cellsQUESTION 2 Which type of molecule recognizes macromolecules that are present in/on certain groups of pathogens? Complement proteins Histamines Interferons Toll-like receptorsQuestion 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.