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chapter 14 (14.5-6 (t cellsare responsible for- cellular immunity, the…
chapter 14
14.5-6
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the major histocompatibility complex (mhc)- is a membrane protien that can recognize foreign antigens
cytotoxic y cellsdestroy their targetcells by releasing substances that alter-protien production,ribosomes dna cell membranes
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in order for a lymphocyte to respond to an antigen, the antigen mus- bind to specificreceptors on the lympocyte membrane
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immunoglobulins that are the lergest class and are mainly responsible for resistance agianst viruses, bacteria,and bacterial toxins are -IgG
immunglobulins that attach to mast cells are basophils and are involved in allergic reactions are IgE
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the binding of an antigen to an antibody can resultin -neutralization of the antigen,agglutination or precipitation, complemennt activation, destroction of the antigen
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antibodies cause which of the following reactions- agglutination, precipitation, neutralization,opsonization
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the chemical mediators responsible for killing tumor cells, stimulating t cells activity and inhibiting parasites and viruses are termed - tumer necrosisfactor
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14.7-8
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the human immunodeficiency virus(hiv) that causes the disease known as aids selectivly infects -helper t cells
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which of the following is anautoimmune disease-graves disease, rheumatoid arthritis, pernicious anemia, type 1 diabetes mellitus
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changes in the immune system that accompany aging include- t cells becoming less responssive to antigens
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the increased incidence of cancer in the elderly reflects thefact that- immune surveillance declines with age
14.2
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in general, lymphocytes spend little time in the blood- have a relatively long life span - are not evenly distributed in the lymphoid tissues
lymph nodes -monitor the contents of lymph by removing debris and pathogens, act as a check station for cancer cells
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the two collecting ducts that drain thelymphatic trunks are the thoracic duct and right lymphaticf duct
the primary function of the lymphoidystem is production, maintance, and distribution of lymphocytes
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lymphoid organs are diffrent fromlympoid tissues in that lymphoid organs are seperated from surrounding tissues by a fibrouse capsule and lympoid tissues are not
the spleen -isthe largest lymphoid organ- contains nodules similar to other lymphoid nodule- contains lympocytes
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14.3
major events associated with inflamation included -redness,swelling,heat, and pain
the body's nonspecificdefense include - skin, complement, interferon, inflammation
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interferons may be described as- products of activated lymphocytes and macrophages - antiviral substances-an example of cytotoxin- coordnators of local defense activaties
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