10:20SCID (Severe combined immunodeficiency) || symptoms and immunology || ImmunodeficiencyAnimated biology With arpan794views
09:01Type I hypersensitivity (IgE-mediated hypersensitivity) - causes, symptoms, pathologyOsmosis from Elsevier224views
05:01B Cells vs T Cells | B Lymphocytes vs T Lymphocytes - Adaptive Immunity - Mechanism5MinuteSchool1149views1rank
05:01B Cells vs T Cells | B Lymphocytes vs T Lymphocytes - Adaptive Immunity - Mechanism5MinuteSchool286views
Textbook QuestionWhich of the following conditions may lead to the development of autoimmunity?a. Self antigens not previously encountered by T cells are released into the circulation.b. Foreign antigens mimic self antigens.c. Cells may inappropriately display class II MHC molecules.d. Certain pathogens nonspecifically activate B cells.e. All of the above are correct.225views
Textbook QuestionWhat are the three classes of lymphocytes, and where does each class originate?215views
Textbook QuestionA decrease in which population of lymphocytes would impair all aspects of an immune response? (a) cytotoxic T cells, (b) helper T cells, (c) regulatory T cells, (d) B cells, (e) plasma cells.198views
Textbook QuestionPerforins are proteins associated with the activity of (a) T cells, (b) B cells, (c) NK cells, (d) plasma cells.212views
Textbook QuestionExplain why a patient with AIDS due to HIV is at an increased risk of infection and of developing certain cancers.161views
Textbook QuestionMark the following statements as true or false. If a statement is false, correct is to make a true statement.b. The secondary immune response is mediated by plasma cells.174views
Multiple ChoiceAll of the following are examples of autoimmune disorders EXCEPT __________.3760views1comments
Textbook QuestionHow does a cytotoxic T cell destroy another cell displaying antigens bound to class I MHC proteins?220views
Textbook QuestionAlthough the adaptive immune system has two arms, it has been said, 'no T cells, no immunity.' Explain.329views
Textbook QuestionMr. White developed neutropenia as a consequence of cancer chemotherapy, which destroyed much of his bone marrow. What other components of the immune system would be harmed by bone marrow destruction? Would you expect his hematocrit to be elevated or decreased? What effects would you expect to see from this change in hematocrit? (Connects to Chapter 19)177views
Multiple Choice__________ is the property of lymphocytes that prevents them from attacking the body's own cells.557views
Textbook QuestionBlocking the antigen receptors on the surface of lymphocytes would interfere with (a) phagocytosis of the antigen, (b) that lymphocyte's ability to produce antibodies, (c) antigen recognition, (d) the ability of the lymphocyte to present antigen, (e) opsonization of the antigen.220views
Textbook QuestionMark the following statements as true or false. If a statement is false, correct it to make a true statement.b. The immune response to a viral infection involves NK cells and different kinds of lymphocytes.175views
Textbook QuestionCD4 markers are associated with (a) cytotoxic T cells, (b) regulatory T cells, (c) helper T cells, (d) all of these.297views
Textbook QuestionType I hypersensitivity is due to release of inflammatory mediators from_____, and type IV hypersensitivity is due to the actions of_____.a. TH cells; macrophagesb. neutrophils; TH cellsc. B cells; TC cellsd. mast cells; TH cells175views
Multiple ChoiceWhich of the following is NOT a consequence of the immune system lacking an immune tolerance?104views
Multiple ChoiceWhich type of disease results from the inability of the immune system to distinguish self- from nonself-antigens?1240views1rank
Textbook QuestionLymphocytes that develop immunocompetence in the bone marrow are a. T lymphocytes, b. B lymphocytes, c. NK cells, d. B and T lymphocytes.248views
Textbook QuestionMark the following statements as true or false. If a statement is false, correct it to make a true statement.d. Cancer cells are destroyed by NK cells, TC cells, and macrophages.183views
Textbook QuestionComplement proteins are crucial for stimulating phagocytes to clear immune complexes. Predict what type of hypersensitivity disorder might result from complement deficiencies. Explain what other consequences might arise from a complement deficiency.166views
Textbook QuestionGive a function for each of the following: (a) cytotoxic T cells, (b) helper T cells, (c) regulatory T cells, (d) plasma cells, (e) NK cells,208views
Textbook QuestionMark the following statements as true or false. If a statement is false, correct it to make a true statement.e. Dendritic cells may activate both TH and TC cells.182views
Multiple ChoiceWhich of the following is NOT a key characteristic of adaptive immunity?1063views2rank
Textbook QuestionGive a function for each of the following: (f) stromal cells, (g) epithelial reticular cells, (h) interferons, (i) pyrogens, (j) T cells, (k) B cells,238views
Textbook QuestionWhen naïve B cells are activated, they differentiate into:a. plasma cells.b. memory cells.c. both a and b.d. none of the above.177views
Textbook QuestionOn which type(s) of cells are class I MHC molecules located?a. Antigen-presenting cells onlyb. B cells onlyc. All nucleated body cellsd. Antigen-presenting cells and B cells172views
Textbook QuestionFill in the blanks: Class I MHC molecules display_____antigens and activate_____cells. Class II MHC molecules display _____antigens and activate_____cells.174views
3:21
