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- An allergy can best be defined as ______. A) a component of the humoral response B) an exaggerated response to an allergen C) part of the normal immune response D) a type of cell-mediated adaptive immunity27) In response to alerting cell activation, the B cell covers pathogens with ______________ to make recognition easier for the immune system. A) Antigens B) Toxoids C) Antibodies D) Immunoglobins7. Which of these cells can activate both B & T lymphocytes? a) Helper T cells b) Plasma cells c) Cytotoxic T cells d) Neutrophils e) Mast cells 8. Which of the following happens when a B cell is activated? a) Inflammation b) The activated B cell differentiates into plasma cells and memory cells c) The B cell will suppress the immune response d) It acts as a phagocyte to engulf antigens e) The activated B cell will release haptens 9. How are T lymphocytes activated? a) Release of histamine during the inflammatory process triggers their activation b) By interferon and antibodies Contact with exposed collagen activates helper T cells d) Through direct contact with a foreign antigen e) Activation of any component of the nonspecific immune response will activate T cells 10. The variable region of an antibody c) ngang naging a) Binds to a specific epitope on an antigen. b) Can bind to several different antigens on the same bacterial cell. c) Binds to the first complement protein (C1). d) Is…
- Which of the following components of the immune system recognizes pathogen-associated molecular patterns? a.) Macrophages b.) Dendritic cells c.) Proteins of the complement system d.) All of above7. The major innate cell type to eliminate viral-infected cells are A). NK cells B). Neutrophils C). Macrophages D). Dendritic cells E). Tc cells. 8. Antibodies in the serum were secreted from A). TH cells B). Plasma cells C). Antigen presenting cells D). Naïve B cells E). Mature B cells 9. Which can initiate anti-viral responses? A). Tal cytokines released by epithelial cells. B). TH1 cytokines released by B cells. C). TH2 cytokines released by NK cells. D). TH17 cytokines released by basophils. E). All of the above.While you are jogging carly in the moming, you slip on some ice and skin your knee. Following the breach in skin, which of the following MIGHT be expected? a) Release of histamine, prostaglandins and leukotrienes b) Extravasation of neutrophils c) Complement activation d) ONLY a & b e) All of the Above
- Delayed-type hypersensitivity reactions in the skina) are characterized by a wheal and flare reaction.b) peak at 4 to 6 hours after exposure to antigen.c) require complement activation.d) show induration because of the influx of sensitized T cells and macrophages.e) depend on activities of the Fc portion of antibodies.Severe sepsis is a major cause of postoperative morbidity and mortality. What could contribute to the high incidence of postoperative sepsis. a.) No postoperative antibiotics given b.) Lack of feedback inhibition to the immune system by the HPA axis c.) Autoimmune activity d.) Suppression of innate and cell-mediated immunityAn allergic reaction is an example of: a) the immune system not working at all. b) a deficiency of B cell responses. c) the immune system doing its job too well. d) an overabundance of T cell responses.
- Choose the most accurate characteristic of B cells. A) They help establish and control the sensitivity of the immune response. B) They stimulate the activities of T cells. C) They attack foreign cells, normal cells infected with viruses, and cancer cells that appear in normal tissues. D) They continually monitor peripheral tissues. E) They differentiate into plasma cells that secrete antibodies.B cell-receptors differ from T cell-receptors in that ________. A) B cell-receptors are immunoglobulins similar to those that are secreted, whereas T cell-receptors are not immunoglobulins and are never secreted B) T cell-receptors are much smaller than B cell-receptors C) All of the choices reflect differences between B cell- and T cell-receptors. D) B cell-receptors are comprised of four polypeptides, whereas T cell-receptors are made up of two polypeptidesWhich of the following lists contains cells that are typically considered to be associated with the innate immune response? Question 14 options: A) neutrophils, macrophages, T cells B) neutrophils, macrophages, NK cells C) B cells, T cells, and NK cells D) basophils, T cells, mast cells