which of the following is true about the immune system? check all that apply. a. cd8 t cells eliminate intracellular pathogens such as viral infected cells b. cd8 t cells with the help of cd4 t cells can eliminate viral infections c. cd4 cells make cytokines to help t cells, b cells and other immune cells d. a typical infection is initially controlled by innate immunity followed by adaptive immunity and generation of memory response e. antibodies eliminate extracellular pathogens or antigens circulating in the human body

which of the following is true about the immune system? check all that apply. a. cd8 t cells eliminate intracellular pathogens such as viral infected cells b. cd8 t cells with the help of cd4 t cells can eliminate viral infections c. cd4 cells make cytokines to help t cells, b cells and other immune cells d. a typical infection is initially controlled by innate immunity followed by adaptive immunity and generation of memory response e. antibodies eliminate extracellular pathogens or antigens circulating in the human body

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter34: Immunity

Section: Chapter Questions

Problem 7SA

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Match the immunity concept with the best description. ___anaphylactic shock a. recognizes antigen ___immune memory b. inadequate immune response ___autoimmunity c general defense mechanism ___inflammation d. immune response against ones own body ___immune deficiency e. secondary response ___antigen receptor f. acute allergic reaction ___antigen processing g. presenting antigen together with MHC markers
Select all of the following statetments that apply to immunological memory: A. A small population of plasma cells secrete pathogen-specific antibody long after pathogen clearance from the body. B. Memory T cells and memory B cells originate in secondary lymphoid tissue through colonal expansion. C. Memory T cells are produced during secondary immune responses, but not during primary immune responses. D. During a primary immune response, effector B cells outnumber memory cells. E. protective immunity persists for the same period regardless of the type of pathogen F. Memory B cells generated in secondary immune responses are more effective than memory B cells made in primary immune responses because of affinity maturation
Antibodies against a specific antigen can be injected into a person to provide passive immunity. For which reason is this NOT as effective as the process of vaccination with that antigen? Select one: a. Injection of antibodies may cause allergic reactions, while vaccination never causes allergic reactions. b. Injection of antibodies does not provide long-lasting immunity, and vaccination with antigens triggers a clonal selection of B cells and cytotoxic T cells. c. Vaccination with antigens triggers a clonal selection of B cells and cytotoxic T cells. d. Injection of antibodies does not provide long-lasting immunity. e. Injection of antibodies does not provide long-lasting immunity and may cause allergic reactions, while vaccination never causes allergic reactions.
Which of the following is NOT true about T cells?(a) T cells develop from lymphoid stem cells in the bonemarrow and mature in the thymus.(b) Cell-mediated immunity is primarily carried out by Tcells.(c) Subsequent differentiation of T cells produces cytotoxic(killer) T cells, delayed-hypersensitivity T cells, helper Tcells, and regulatory T cells.(d) Natural killer cells (NK) are exclusively differentiated Tcells.(e) T cells act in situations where antigens are embeddedin cell membranes or are inside host cells and thus areinaccessible to antibodies.
Which of the following statements is NOT true of a fever?a. Temperature is regulated by chemicals that reset the body's thermostat to a higher setting.b. The higher than normal body temperature impairs the functions of some bacteria.c. The higher than normal body temperature is always harmful.d. The higher temperature impairs leukocytes andantibody production.e. Both c and d. Which of the following statements is NOT true of antibodies?a. They bind to foreign antigens, making them susceptible to being engulfed by phagocytes.b. They serve as specific binding sites on B cells.c. An antibody is usually able to bind to a variety of different types of antigensd. They are composed of two heavy chains and two light chains.
Which of the following statements regarding intraepithelial lymphocytes is false? (Select all that apply.) a. They comprise approximately 10% of the cells in the mucosal epithelium. b. They are composed of both CD4 and CD8 T cells. c. They are separated from the lamina propria by a basement membrane. d. They are activated effector T cells with a narrow range of antigen specificities. e. They do not include NK cells. f. They express the α4:β7 integrin that binds to E-cadherin on epithelial surfaces.
Which of the following accurately describes the inducibility of adaptive immunity? A) a given immune response acts against a specific antigen possessed by a pathogen B) both cells and antibodies are involved in immune responses C) immune cells acting against a given pathogen increase greatly in number upon encountering that pathogen D) immune responses against previously encountered pathogens are faster and more potent E) immune responses against the body's own molecules do not normally occur F) pathogens stimulate cells involved in adaptive immunity
Which of the following pairs is mismatched? a. activation of memory cells: secondary immune response b. central memory T cells: restricted to non-lymphoid tissues c. protective immunity: antibodies persist after primary immune response d. attenuated vaccine: not pathogenic e. vaccination: primary immune response.
Indicate whether the following questions are true (T) or false (F). a. Secondary immune responses take the same amount of time as primary immune responses to become effective. b. On secondary exposure to an infectious agent there is reduced mortality. c. Only immune responses made in mucosal secondary lymphoid tissues can provide protective immunity. d. If an individual acquires a second cold in the same season it will most probably be caused by a different type of cold virus. e. Plasma cells generated in a secondary immune response have longer life-spans than those made during a primary immune response. f. During a primary immune response, only memory B cells are generated.
Which of the following pairs is mismatched? a. plasma cell: mediation of phagocytosis and killing of microorganisms in the plasma b. megakaryocyte: formation of platelets c. dendritic cell: activation of adaptive immune responses d. natural killer cell: develops from a common lymphoid progenitor e. neutrophil: formation of pus f. regulatory T cell: inhibition of T-cell activity.
Which of the following statements about T cells is false? a. Helper T cells release cytokines while cytotoxic T cells kill the infected cell. b. Helper T cells are CD4+, while cytotoxic T cells are CD8+. c. MHC II is a receptor found on most body cells, while MHC I is a receptor found on immune cells only. d. The T cell receptor is found on both CD4+ and CD8+ T cells.
Ibuprofen dampens the immune system’s inflammation response.What might be a short-term consequence of taking ibuprofen?a. Blood vessels may become less permeable.b. Antibodies may become less active.c. Cytotoxic T cells may begin to divide.d. All of the above are correct