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CH 43 BIO

Chapter 43 Bio Study Stack

QuestionAnswer
Which action below is affected by an antihistamine? A. Clonal selection by antigens B. MHC Presentation by Macrophages C. Blood Vessel dilation D. the secondary immune response E. Phagocytosis of antigens C. Blood Vessel Dilation
A bacterium has elements on its surface that are resistant to lysozyme. If an individual is infected with this bacterium, what would occur first? Successful reproduction of the bacterium and continued disease
Clonal selection is an explanation of how an antigen can provoke production of high levels of specific antibodies.
These cells are involved in innate immunity, and a person lacking these cells may have a higher than normal chance of developing malignant tumors: natural killer cells
Which of the following are T cells of the immune system? A. CD4, CD8, and plasma cells B. Class I MHC, Class II MHC, and memory cells C. Cytotoxic and helper cells D. Plasma, antigen-presenting and memory cells E. Lymphocytes, macrophage&Dendritic ce C. cytotoxic and helper cells
What cell type interacts with both the humoral and cell-mediated immune pathwawys? helper t cells
B cells interacting with helper T cells are stimulated differentiate when... helper T cells release cytokines.
Both the eye and the respiratory tract are protected against infections by what? the secretion of lysozyme onto their surface
Give an example that would account for immunological memory... the ancient observation that someone who had recovered from the plague could safely care for those newly diseased
A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to... interact with a class II MHC- antigen complex
Give an example of inflammatory response... example...increased activity of phagocytes in an inflamed area
What pathway would lead to the activation of cytotoxic T cells? Body cell becomes infected with a virus-> new viral proteins appear -> class I MHC molecule-viral antigen complex displayed on cell surface
which of the following is the last line of defense against an extracellular pathogen? A. histamine release by basophils B. Lysozyme productions C. Phagocytosis by neutrophils D. Antibody production by plasma cells E. Phagocytosis by natural killer ce D. Antibody production by plasma cells
A Bacterium entering the body through a small cut in the skin will do what... activate a group of proteins call complement
Phagocytosis of microbes by macrophages is enhanced by which of the following? A. The Binding of Antibodies to the surface of the microbes B. Antibody-mediated agglutination of microbes C. the release of cytokiness by activated b cells D. A and B D. A and B.
What are antigens? foreign molecules that trigger the generation of antibodies
Created by: 804740173
 

 



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