Some work as ie they neutralize toxins for eg those

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Some work as __________ (i.e. they neutralize toxins for e.g. those causing diphtheria and tetanus). Some attach to bacterial flagella making them less active and easier for phagocytes to engulf. Some cause ______________ (clumping together) of bacteria making them less likely to spread Q: But where do antibodies come from? Image: Antigen antibody complex , Dr. Sanderson Immunology Page; Opsoni n, Graham Colm Third Line of Defense From the Virtual Microbiology Classroom on ScienceProfOnline.com
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___________ System Screens tissues of the body for foreign antigens. Composed of lymphatic vessels and lymphatic cells. One-way system that conducts lymph from local tissues and returns it to the circulatory system. Lymph is a liquid with similar composition to blood plasma. Comes from fluid leaked from blood vessels into surrounding tissues. Lymph nodes house white blood cells called __________ that recognize and attack foreign antigens present in lymph. Image: Lymphatic system ; The Emirr Third Line of Defense From the Virtual Microbiology Classroom on ScienceProfOnline.com
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Lymphocytes WBCs of specific immunity. Smallest leukocytes . Have huge nucleus surrounded by thin rim of cytoplasm. Produced from blood stem cells in the red bone marrow. Two main types: ________ mature in bone marrow, then concentrate in lymph nodes & spleen. ________ mature in thymus. B and T cells mature then circulate in the blood and lymph. Circulation ensures they come into contact with pathogens and each other. Image: Lymphocyte SEM; Dr. Triche National Cancer Institute; Lymphocyte, Nicolas Grandjean Third Line of Defense From the Virtual Microbiology Classroom on ScienceProfOnline.com
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T Lymphocytes (T cells) Produced in red bone marrow and mature in thymus. Circulate in the lymph and blood and migrate to the lymph nodes (and other areas of the lymph system). Part of the cellular immune response (aka cell-mediated immune response) because these cells act directly against various antigens Endogenous invaders (intracellular pathogens inside the body’s cells) Abnormal body cells such as cancer cells Types _______ or ____ T cells ( T C ) ________ T cells ( T H ) Image: Antigen presentation , Sjef Third Line of Defense: Cell-mediated Immune Response From the Virtual Microbiology Classroom on ScienceProfOnline.com
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B Lymphocytes (B cells ) Activated B-lymphocytes produce either: _______ ______ make antibodies to a pathogen. ________ _______ remember the same pathogen for faster antibody production in future infections. Image: B cell differentiation, Source unknown Third Line of Defense: Humoral Immune Response From the Virtual Microbiology Classroom on ScienceProfOnline.com
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Confused? Here are links to fun resources that further explain acquired immunity: Immunology: Innate & Acquired Immunity Main Page on the Virtual Cell Biology Classroom of Science Prof Online .
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