Description : Epithelioid cells within granulomas are derived from which of the following? B A. Plasma cells B. Macrophages C. Lymphocytes D. None of these
Last Answer : Macrophages
Description : The most active phagocytic white blood cells are (a) eosinophils and lymphocytes (b) neutrophils and monocytes (c) neutrophils and eosinophils (d) lymphocytes and macrophages.
Last Answer : (b) neutrophils and monocytes
Description : Which of the following statement(s) is/are true concerning ischemia reperfusion injury? a. During ischemia, ATP degradation results in increased plasma and intracellular levels of ... immunization with antibodies to neutrophil adhesive complex lessen the ischemic/reperfusion microvascular injury
Last Answer : Answer: a, b, c, d During the ischemia and hypoperfusion phase, degradation of ATP stores essential to maintain cell integrity and significant loss of diffusible ... either the neutrophil adhesive complex or the endothelial selectins dramatically lessens ischemia/reperfusion microvascular injury
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 : What is the histopathology of the pathogenesis of the plaque following 21 days of plaque accumulation: A. Primarily infiltrate of plasma cells B. Primarily infiltrate of lymphocytes C. Infiltrate of plasma cells and early bone involvement D. Infiltrate of neutrophils
Last Answer : C. Infiltrate of plasma cells and early bone involvement
Description : Early granulation tissue is BEST characterized by the presence of: C A. Plasma cells and macrophages B. T lymphocytes and eosinophils C. Capillary buds and fibroblasts D. None of these
Last Answer : Capillary buds and fibroblast
Description : Tissue macrophages are derived from which one of the following? A. Resident activated fibroblasts B. Activated B lymphocytes C. Circulating monocytes D. Platelets
Last Answer : Platelets
Description : Each of the following regarding plasma cells is true EXCEPT: C A. The nuclei display prominent peripheral chromatin B. They are derived from B lymphocytes C. They contain prominent absorptive vacuoles D. None of these
Last Answer : They contain prominent absorptive vacuoles
Description : A granuloma is C A. a small nodule of granulation tissue B. a tumour composed of granulocytes C. composed primarily of epithelioid cell, fibroblasts and lymphocytes D. None of these
Last Answer : composed primarily of epithelioid cell, fibroblasts and lymphocytes
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 cells which are responsible for the production of antibodies are – (1) red blood cells (2) neutrophils (3) lymphocytes (4) platelets
Last Answer : (3) lymphocytes Explanation: An antibody (Ab), also known as an immunoglobulin (Ig), is a large Y-shaped protein produced by B-cells that is used by the immune system to identify and ... called antigens usually on the outside of an invading organism. This is called the antigen-antibody reaction.
Description : Which pair of cells represents granulocytes? a. Basophils and lymphocytes b. Neutrophils and eosinophils c. Eosinophils and monocytes d. Lymphocytes and monocytes
Last Answer : b. Neutrophils and eosinophils
Description : The cells which are responsible for the production of antibodies are (1) red blood cells (2) neutrophils (3) lymphocytes (4) platelets
Last Answer : lymphocytes
Description : MHC class II proteins are present on the surface of (A) All cells (B) B lymphocytes only (C) Macrophages only (D) Macrophages and B lymphocytes
Last Answer : Answer : D
Description : The initiation of a humoral immune response involves a complex interaction of the antigen, cells and intercellular messengers. Which of the following statement(s) concerning the initiation of the ... various cellular components of the immune system d. An antigen must be a living microorganism
Last Answer : Answer: a, b Stimulation of the immune system occurs after a variety of antigen-presenting cells (B lymphocytes, macrophages, dendritic cells, and Langerhans cells) act to engulf ... polysaccharides), most antigens require coordinated efforts of the various cellular components of the immune system
Description : Which of the following statement(s) is/are true concerning the cell function of phagocytosis? a. Phagocytosis is a mechanistically distinct process of endocytosis performed by special cells to take ... known as clathrin d. Phagocytosis is performed only by white blood cells and tissue macrophages
Last Answer : Answer: a Phagocytosis is a specialized form of endocytosis by which large particles are internalized by specialized cells primarily macrophages and neutrophils. To be phagocytosed, particles ... the lumen of the thyroid follicle, thereby releasing the thyroid hormones, thyroxine triiodothyronine
Description : Predominant cell types in typical chronic inflammation are all of the following EXCEPT: A A. Polymorphonuclear leukocytes B. Macrophages C. T helper lymphocytes D. NK cells
Last Answer : Polymorphonuclear leukocytes
Description : AIDS virus destroys – (1) Lymphocytes (2) Monocytes (3) Neutrophils (4) Basophils
Last Answer : (1) Lymphocytes Explanation: AIDS virus destroys the T-cells inside of the immune system. T cells or T lymphocytes belong to a group of white blood cells known as lymphocytes, and play a central role in cell-mediated immunity.
Description : Match the following columns and select the correct option. Column-I Column - II (A) Eosinophils (i) Immune response (B) Basophils (ii) Phagocytosis (C) Neutrophils (iii) Release histaminase, destructive enzymes (D) Lymphocytes (iv) ... (iii) (c) (i) (ii) (iv) (iii) (d) (ii) (i) (iii) (iv)
Last Answer : (a) (iii) (iv) (ii) (i)
Description : Which of the following terms refers to a form of white blood cell involved in immune response? a) Lymphocyte Both B and T lymphocytes respond to exposure to antigens. b) Granulocyte Granulocytes ... blood cell without central pallor, seen with hemolysis. d) Thrombocyte A thombocyte is a platelet.
Last Answer : a) Lymphocyte Both B and T lymphocytes respond to exposure to antigens.
Description : Suppuration is mainly the result of the combined action of four factors; which of the following is not one of these factors?CHECK A. Necrosis B. Presence of lymphocytes C. Collection of neutrophils D. Accumulation of tissue fluid E. Autolysis by proteolytic enzymes
Last Answer : B. Presence of lymphocytes
Description : AIDS virus destroys (1) Lymphocytes (2) Monocytes (3) Neutrophils (4) Basophils
Last Answer : Lymphocytes
Description : In our body, antibodies are formed against pathogens in – (1) liver by RBC (2) blood by platelets (3) brain by macrophages (4) thymus by lymphocytes
Last Answer : (4) thymus by lymphocytes
Description : Reactive oxygen metabolites are produced by all the following EXCEPT: B A. Macrophages B. Lymphocytes C. Monocytes D. None of these
Description : Predominant cell types in typical chronic inflammatory reactions include all of the following EXCEPT: A A. Polymorphonuclear leukocytes B. Macrophages C. T helper lymphocytes D. None of these
Description : Which one of the following are cardinal features of granulation tissue? C A. Abundant collagen B. Proliferating macrophages and lymphocytes C. Proliferating capillaries and fibroblasts D. None of these
Last Answer : Proliferating capillaries and fibroblasts
Description : In our body, antibodies are formed against pathogens in (1) liver by RBC (2) blood by platelets (3) brain by macrophages (4) thymus by lymphocytes
Last Answer : thymus by lymphocytes
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 : In the body's immune system, _____ are the major producers of secreted antibodies. a. macrophages b. plasma cells c. T cells d. B cells
Last Answer : b. plasma cells
Description : Ependymal cells lining the cavity of brain and spinal cord constitute (a) epithelioid tissue (b) ealse epithelium (c) mesothelium (d) endothelium
Last Answer : Ans:(b)
Description : Cell-mediated immunity is the function of (A) B lymphocytes (B) T lymphocytes (C) Plasma cells (D) Basophils
Last Answer : Answer : B
Description : Which of the following elements is not found in normal periodontal membrane: A. Fibroblast B. Epithelial cells C. Erythrocytes D. Vest cells of malaise E. Inflammatory plasma cells and lymphocytes
Last Answer : C. Erythrocytes
Description : White blood cells are called: a) lymphocytes b) leucocytes c) plasma
Last Answer : ANSWER: B -- LEUCOCYTES
Description : The following statement(s) is/are true concerning cellular defense mechanisms. a. Macrophages function solely as antigen processing cells in the initial reaction to exposure to an antigen b. Macrophages ... in only small numbers within the tissue and enter an area of infection through diapedesis
Last Answer : Answer: b, d A wide variety of cell types serve to provide host defense at several levels. Macrophages act as the initial antigen processing cell that serves to ... through diapedesis after chemotactic stimuli are excluded by macrophages, bacterial breakdown products, and complement activation
Description : Cytokines are low-molecular-weight polypeptides exerting a wide variety of biologic effects at both local and systemic levels. Which of the following statement(s) is/are true concerning the production and ... effects on the host d. Each specific cytokine is produced by a single cell type
Last Answer : Answer: c Macrophages, endothelial cells, lymphocytes, and other cells secrete a large number of different compounds, termed cytokines, that are most probably evolved for the purpose of ... host defenses, exerting both salutatory and deleterious effects on the host, has become increasingly evident
Description : At which stage of HIV infection does one usually show symptoms of AIDS? (a) Within 15 days of sexual contact with an infected person (b) When the infected retro virus enters host cells (c) ... large number of helper T - lymphocytes (d) When the viral DNA is produced by reverse transcriptase
Last Answer : (c) When HIV damages large number of helper T - lymphocytes
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 : Which one of the following cell types is NOT derived from myeloid progenitors? a. Lymphocytes b. Monocytes c. Eosinophils d. Neutrophits
Last Answer : a. Lymphocytes
Description : If not pruritic, linear granulomas should be treated how A. Prednisone B. Prednisolone C. Scientific Neglect D. Cyclosporin
Last Answer : Ans: C
Description : Regional enteritis is characterized by: a) Transmural thickening Transmural thickeneing is an early pathologic change of Crohn's disease. Later pathology results in deep, penetrating ... prolonged and variable course while ulcerative colitis is characterized by exacerbations and remissions.
Last Answer : a) Transmural thickening Transmural thickeneing is an early pathologic change of Crohn’s disease. Later pathology results in deep, penetrating granulomas.
Description : Used as a laxative, liquid paraffin has the following drawbacks except: A. It interferes with absorption of fat soluble vitamins B. It is unpleasant to swallow C. It causes griping D. It can produce foreign body granulomas
Last Answer : C. It causes griping
Description : Lymphocytes are responsible for the formation of (A) Serum (B) Plasma (C) Antibody (D) Calcium
Last Answer : Answer : C
Description : Which one of the following is correct? (a) Lymph = Plasma + RBC + WBC (b) Blood = Plasma + RBC + WBC + Platelets (c) Plasma = Blood – Lymphocytes (d) Serum = Blood + Fibrinogen
Last Answer : (b) Blood = Plasma + RBC + WBC + Platelets
Description : Carbonic anhydrase occurs in (a) lymphocytes (b) blood plasma (c) RBCs (d) leucocytes.
Last Answer : (c) RBCs
Description : The function of lymphocytes is/are________ a. Production of heparin b. Production of antibodies c. Production of plasma d. Production of haemoglobin protein
Last Answer : b. Production of antibodies
Description : Increasing evidence has implicated gram-negative bacterial lipopolysaccharide (LPS endotoxin) as the portion of the gram-negative bacterial cell membrane responsible for many, if not all the ... host, exerting deleterious effects on the host when excessive amounts reach the systemic circulation
Last Answer : Answer: a, b, d The LPS molecule exerts diverse effects on the mammalian host. Immunologic responses to LPS include nonspecific polyclonal B-cell proliferation, macrophage activation and ... deleterious effects on the host only after large amounts are secreted and reach the systemic circulation
Description : During which stage or phase of bone healing after fracture is devitalized tissue removed and new bone reorganized into its former structural arrangement? a) Remodeling Remodeling is the final stage of ... occurs during the reparative stage but is disrupted by excessive motion at the fracture site.
Last Answer : a) Remodeling Remodeling is the final stage of fracture repair.
Description : During which stage or phase of bone healing after fracture does callus formation occur? a) Reparative Callus formation occurs during the reparative stage but is disrupted by excessive motion ... the fracture area. d) Revascularization Revascularization occurs within about 5 days after the fracture.
Last Answer : a) Reparative Callus formation occurs during the reparative stage but is disrupted by excessive motion at the fracture site
Description : In a patient of pulmonary tuberculosis, pyrazinamide is most active on the following subpopulation of tubercle bacilli: A. Rapidly multiplying bacilli located on cavity walls B. Slow ... showing inflammatory response C. Intermittently multiplying bacilli within caseous material D. Dormant bacilli
Last Answer : B. Slow growing bacilli within macrophages and at sites showing inflammatory response
Description : Which of the following WBCs are phagocytic cells. (a) Monocytes (b) Neutrophils (c ) Basophils (d) Eosinophils
Last Answer : Which of the following WBCs are phagocytic cells. (a) Monocytes (b) Neutrophils (c ) Basophils (d) Eosinophils A. Only ... a) and (c ) D. (c ) and (d)