Question

37 through 42

37. lgG, igA, gM, lgD, and lgE are all examples of a. antigens. b. isotypes. c. idiotypes. d. allotypes 38. Using the data from the differential white blood cell count table below, which patient profile displays a parasitic infection? Table 15.1 Guidelines for Interpreting White Blood Cell (WBC) Counts writh Diferential a. Patient 1 b. Patient 3 b. Patient 2 d. None 39, A micr would be expected to occur? obe is ingested and broken into fragments by an antigen-presenting cell (APC). Which of the following a. b. c. d. B cells will bind to antigens on the surface of the APC. B cells will release cytokines to activate T cells. Plasma cells will release cytokines to activate the APC T cells will bind to antigens on the surface of the APC The figure shown below illustrates clonal expansion of activated 8 cells. What are the two cell types produced by this cell line? 40. a. b. c. d. plasma cells and memory B cells antigen-presenting cells and memory T cells activated T cells and plasma cells memory B cells and dendritic cells 41. Which of the following statements correctly describes the molecules that elicit an immune response? a. Antigens are small molecules that must be bound to an immunogen to elicit an immune response. b. Small segments of an antigen that elicit an immune response are called epitopes c. Hap d. Immunogens are small segments of antigens that are recognized by the immune system. tens are proteins that elicit the synthesis of antibodies and are also known as antigens 42. Which of the following accurately describes how a foreign molecule leads to the production of antibody? Individual epitopes on an antigen are recognized and a single antibody is produced for each epitope The immune system recognizes whole microbes and responds by secreting a single antibody against the microbe. a. b. c. mmune system recognizes individual haptens on an antigen and secretes several antibodies directed against that hapten. The i each group. d. Groups of epitopes on an antigen are recognized and a single antibody is produced for

Answer 1

Answer for question number 37 : The correct option is B (Isotypes)

Explanation :

Isotypes : Antibodies differing in heavy chain constant regions associated with different classes of antibodies and subclasses of immunoglobulins. In humans isotypes includes IgG, IgA, IgM, IgD and IgE, which of which is an isotypic varients and present in all individuals of a species. For example there are five isotypes of IgG such as, IgG1, IgG2, IgG3, and IgG4.

Allotypes : Refers to the genetically controlled immunoglobulin molecules and reflects variations in the heavy chains. (Antigenically different forms of given type of immunoglobulin that occurs in different individuals of the same species)

Idiotypes : Individual specific immunoglobulin molecules that differs in the Fab fragments and recognise different specific epitopes.