Description : What type of immune defensive cell is found in the sublayers of the epidermis? a. Keratinocyte b. Dendritic (Langerhans) cell c. Neutrophil d. Basophil
Last Answer : b. Dendritic (Langerhans) cell
Description : All forms of immunity depend on an exposure to antigens and a subsequent response by _____ cells. a. basophil b. neutrophil c. NK d. T
Last Answer : d. T
Description : TH2 cells bind to a. MHC-11/peptide complex on APC cells. b. B cell receptors. c. MHc-1/etid complex on infected cells. d. MHC-11/peptide complex on B cells.
Last Answer : d. MHC-11/peptide complex on B cells.
Description : What type of immune cell may control IgE-mediated hypersensitivities? a. Suppressor T cells b. Plasma cells c. Cytotoxic T cells d. Neutrophils
Last Answer : a. Suppressor T cells
Description : Cytotoxic T-cells can be recognized by which of the following cell surface marker? A- CD4 B- CD7 C- CD8 D- CD9
Last Answer : CD8
Description : Immunosuppressive agents used in preventing transplant rejection primarily affect a. macrophages. b. neutrophils. c. dendritic cells. d. T cells.
Last Answer : d. T cells.
Description : The immune system originates with a primordial cell of the fetus known as the _____ stem cell. a. T b. dendritic c. monocyte d. hematopoietic 18: Which one of the f
Last Answer : d. hematopoietic
Description : The cytotoxic T cells have a_____ co-receptor while the helper T cells have a _____ co-receptor. a. CD8. CD4 b. CD4, CD8 c. MHCI, MHCII d. MHCII, MHCI
Last Answer : a. CD8. CD4
Description : Cytotoxic T cells release which 2 toxic proteins as they fight target cells? a. histamine and heparin b. perforin and granzymes c. interleukin and interferon d. lysozymes and cytokines
Last Answer : b. perforin and granzymes
Description : Performs and granzymes are found in a. Helper T cells. b. Antigen-presenting cells. c. Cytotoxic T cells. d. B cells.
Last Answer : c. Cytotoxic T cells.
Description : TH1 cells activate a. B cells. b. Killing of pathogens in macrophages. c. Cytotoxic T cells. d. Humoral immunity.
Last Answer : d. Humoral immunity
Description : CD8 surface antigen is present in A- cytotoxic T cells B- .suppresssor T cells C- both (a) and (b) D- none of these
Last Answer : both (a) and (b)
Description : A _____ is a protein receptor on the surface of macrophages, dendritic cells, and endothelial cells that allow them to recognize foreign cell markers. a. Toll-like receptor (TLR) b. pathogen-associated c. Membrane attack complex (MAC) d. Natural killer cells (NK)
Last Answer : b. pathogen-associated
Description : Which one of the following applies to the disease systemic lupus erythematosus (SLE)? a. It is a type of cytotoxic hypersensitivity. b. It is often accompanied by a butterfly rash. c. It is due to an overreaction of T lymphocytes. d. It is the result of a cellular hypersensitivity.
Last Answer : d. It is the result of a cellular hypersensitivity.
Description : The figure shows a human blood cell. Identify it and give its characteristics. Blood cell Characteristics (a) Basophil Secretes serotonin, inflammatory response (b) B-lymphocyte Forms about 20% of ... Most abundant blood cells, phagocytic (d) Monocyte Lifespan of 3 days, produces antibodies
Last Answer : (a) Basophil Secretes serotonin, inflammatory response
Description : . MHC class I proteins would be found on___________ whereas MHC class II proteins would be found on_____________ a. Nucleated Cells; Plasma Cells b. Nucleated Cells; Macrophages c. Dendritic Cells; Neutrophils d. Only White Blood Cells; Red Blood Cells
Last Answer : b. Nucleated Cells; Macrophages
Description : Which is not an antigen-presenting cell (or APC)? A- B cell B- .Polymorphonuclear leukocyte (or PMN) C- Dendritic cell D- All of the above
Last Answer : .Polymorphonuclear leukocyte (or PMN)
Description : Booster immunizations are used to raise the antibody level by stimulating the _____ cells to induce the secondary antibody response. a. helper T b. B c. memory d. plasma
Last Answer : c. memory
Description : The transfusion reaction that arises from the mixing of incompatible blood types illustrates a/an a. Form of lupus erythematous. b. Type i hypersensitivity. c. Immune complex reaction. d. Cytotoxic hypersensitivity.
Last Answer : d. Cytotoxic hypersensitivity.
Description : A cytotoxic hypersensitivity would occur if blood type is transfused into a person with blood type a. A;AB b. 0; AB c. A; 0 d. 0; B
Last Answer : a. A;AB
Description : ____ becomes activated to eliminate "nonself" cells, such as virus- infected cells or cancer cells. a. Humoral immune response b. Cell-mediated immune response c. Complement d. Inflammation
Last Answer : b. Cell-mediated immune response
Description : Human immunodeficiency virus destroys (A) Cytotoxic T cells (B) Helper T cells (C) B cells (D) Plasma cells
Last Answer : Answer : B
Description : Cytotoxic T cells release (A) Perforins (B) Interleukins (C) Colony stimulating factors (D) Tumour necrosis factor
Description : CD 3 complex and p 56lck proteins are present in (A) Cytotoxic T cells (B) Helper T cells (C) Both (A) and (B) (D) None of these
Last Answer : Answer : D
Description : CD 4 is a transmembrane glycoprotein present in (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells
Last Answer : Answer : A
Description : CD 8 is a transmembrane glycoprotein present in (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells
Last Answer : Answer : C
Description : MHC Class II proteins, in conjunction with antigens, are recognised by (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells
Description : MHC class I proteins, in conjunction with antigens are recognised by (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells
Description : The most abundant T cells are (A) Cytotoxic T cells (B) Helper T cells (C) Suppressor T cells (D) Memory T cells
Description : The following are true : a. the HLA proteins are found within the cytoplasm of the cells b. HLA class I antigens are expressed on all cells with nuclei c. HLA class II antigens presents ... on chromosome 6 e. HLA tissue typing is carried out in all forms of transplantation to prevent rejection
Last Answer : HLA class I antigens are expressed on all cells with nuclei
Description : Cytotoxic T cells a) lyse cells infected with virus. Cytotoxic T cells play a role in graft rejection. b) are important in producing circulating antibodies. B cells are lymphocytes important in producing ... that decrease B-cell activity to a level at which the immune system is compatible with life.
Last Answer : a) lyse cells infected with virus. Cytotoxic T cells play a role in graft rejection.
Description : Type I ADR reactions is___________ a) Caused when T-cells bind to a specific antigen b) Caused by tissue injury c) IgE mediated d) Caused by cytotoxic antibodies
Last Answer : c) IgE mediated
Description : Which one of the following statements is NOT true of innate immunity? a. It is an early-warning system against pathogens. b. It is a form of immunity found only in vertebrates. c. It is a nonspecific response. d. It responds within minutes to many infections.
Last Answer : b. It is a form of immunity found only in vertebrates.
Description : Which of the following are the features of the Himalayan rivers? 1. They are of youthful nature, forming deep gorges and performing intense erosional activity 2. They are free to form their courses and follow a dendritic pattern 3. They ... (a) I and II (b) I and III (c) II and III (d) I, II and III
Last Answer : Ans: (d)
Description : Which one of the following cells produces antibodies? (1) Eosinophil (2) Monocyte (3) Basophil (4) Lymphocytes
Last Answer : (4) Lymphocytes Explanation: Antibodies are secreted by a type of Lymphocytes (White Blood cell). Antibodies can occur in two physical forms, a soluble form that is secreted from the cell, and ... bacteria and viruses. The antibody recognizes a unique part of the foreign target, called an antigen.
Description : Which one of the following cells produces antibodies ? (1) Eosinophil (2) Monocyte (3) Basophil (4) Lymphocytes
Last Answer : 4 lymphocytes
Description : Acquired immunity consists of humoral immunity maintained by _____ and _____, and cell-mediated immunity controlled by _____ a. T cells, complement, B cells b. T cells, Interleukin, B cells c. B cells, antibodies, T cells d. B cells, histamine, T cells
Last Answer : c. B cells, antibodies, T cells
Description : ._________ cells are associated with immunity while_____________ cells are part of___________ immunity. a. B; cell-mediated; T; innate b. T; humoral; B; cellular c. T; cell-mediated; B; humoral d. T; humoral; B; nonspecific
Last Answer : c. T; cell-mediated; B; humoral
Description : Which of the following is NOT a lymphocyte? a. B-cells b. T-cell c. NK cells d. Basophils
Last Answer : d. Basophils
Description : T cell receptors (or TCR) on CD4+ T cells A.recognize peptides not associated with MHC molecules B.recognize peptides associated with MHC class I molecules C.recognize peptides associated with MHC class II molecules D.are secreted out into the environment to bind antigens
Last Answer : C.recognize peptides associated with MHC class II molecules
Description : Which of the following is correct? A- All T Cells are CD4+ B- An epitope can have multiple antigens C- .T Cell receptors are generated by random assortment of gene cassettes D- .MHC Class II molecules are generated by random assortment of gene cassettes
Last Answer : .T Cell receptors are generated by random assortment of gene cassettes
Description : cell receptors (or TCR) on CD4+ T cells A-recognize peptides not associated with MHC molecules B- recognize peptides associated with MHC class I moleculesC- recognize peptides associated with MHC class II molecules D- are secreted out into the environment to bind antigens
Last Answer : recognize peptides associated with MHC class II molecules
Description : Which of the following is correct for CD8 T cells? A- CD8 T cells only recognize virus-infected cells B- CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells ... selection only D- CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
Last Answer : CD8 T cells can kill individual virus-infected cells in a contact dependent fashion
Description : Which one of the following statements about interferon is FALSE? a. Interferon is produced in response to a viral infection. b. Interferon is a naturally produced protein. c. Interferon puts uninfected cells in an antiviral state. d. Interferon is a protein that binds to RNA virus genomes.
Last Answer : d. Interferon is a protein that binds to RNA virus genomes.
Description : Which one of the following statements is false ? Allergic asthma is characterized by: a) Response to cyclosporin therapy in severe disease. b) Is characterised by reversible airways obstruction. c) T2 ... fluid. d) Affects 5% of the population. e) Is diagnosed routinely by use of ELISA
Last Answer : Ans: E
Description : Which of the following early natural philosophers coined the term cells? a. Lister b. Koch c. Hooke d. Leeuwenhoek
Last Answer : c. Hooke
Description : Exercise sometimes also causes allergies, usually in the form of a. Anaphylaxis b. An asthma attack. c. Hives. d. Edema.
Last Answer : b. An asthma attack.
Description : All the following are types of immediate hypersensitivities except: a. Asthma. b. Contact Dermatitis. c. Food Allergies. d. Hay Fever.
Last Answer : b. Contact Dermatitis.
Description : Severe combined immunodeficiency disease refers to a condition wherein a patient a. Cannot produce T and B cells. b. Interferon. c. Antigen-presenting cells. d. Hydrogen peroxide in phagocytes
Last Answer : a. Cannot produce T and B cells.
Description : What immunodeficiency disorder is associated with a tack of T and B cells and complete immune dysfunction? a. DiGeorge syndrome b. Severe combined immunodeficiency disease c. Chronic granulomatous disease d. Chédiak-Higashi syndrome
Last Answer : b. Severe combined immunodeficiency disease