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  • Human Anatomy And Physiology 2nd Edition Amerman
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Anatomy and Physiology Chapter 20 Mastering Questions And Answers

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Anatomy and Physiology Chapter 20 Mastering Questions And Answers What constitutes the body's first line of defense against disease? - ANS intact skin and mucous membranes Which of the following is a role of interferons (IFNs)? - ANS IFNs help the body combat viral infections. Which defense mechanism results in redness, heat, pain, and swelling? - ANS inflammation Which of the following is an effect of complement activation? - ANS opsonization Cellular immunity is attributed to the action of __________. - ANS T cells What mobilizes the adaptive defenses and provokes an immune response? - ANS antigens Which of the following cells engulf antigens and present fragments of them on their own surfaces, where they can be recognized by cells that will deal with them? - ANS dendritic cells __________ is the most abundant class of antibodies in plasma. - ANS IgG Why are children given vaccinations? - ANS to develop antibodies against various diseases Class II MHC proteins are found on which of the following cell types? - ANS antigen-presenting cells Which class of MHC proteins presents exogenous antigens? - ANS class II MHC proteins Class I MHC proteins are recognized by which of the following cell types (that are destined to become T cells)? - ANS CD8 Which of the following types of cells display protein fragments produced by the cancer within them? - ANS all nucleated cells Which major class of lymphocytes become cytotoxic T cells? - ANS CD8 cells What occurs if a T cell binds to an antigen and the T cell does NOT receive a co-stimulatory signal? - ANS The T cell enters a state of anergy. What types of antigen are recognized by T cells? - ANS processed fragments of protein antigens displayed on surfaces of body cells Treatment of an abscess often requires that it be surgically drained because ______. - ANS the wall of the abscess prevents neutrophils from entering the pus and attacking the pathogens Binding of an eosinophil to an antibody-coated parasitic worm involves binding of the antibody's stem region to a(n) ______. - ANS plasma membrane protein on the eosinophil's surface Tears and mucus membranes would be a part of which defense system? - ANS innate external defenses

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