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Published byBertram O’Neal’ Modified over 9 years ago
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FL #14 Immune System 10BC
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Antigen- binding sites Antigen Antibody Section 40- 2 Figure 40–8 Structure of an Antibody bacterium The bacterium is an antigen
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An infectious disease is caused by Pathogens Bacteria, viruses, & fungi (germs).
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Antibodies-protein that helps destroy pathogens Has 2 antigen binding sites Pathogen invades body Antigens on pathogen recognized by some B cells
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Specific Defenses A. Humoral immunity- Immunity against pathogens in the body fluids (blood & lymph) 1-B cells (WBC) lymphocyte-produce antibodies
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Antigen/antibodies 2- Activated B cells grow and divide rapidly (a million) 3-Produce specialized B cells- plasma cells (T cells help with this also) 4-Plasma cells-release antibodies into the blood to attack the pathogen causing infection
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A person who receives a vaccine for the flu- influenza Is able to produce antibodies against the flu
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When a person receives a vaccine(shot) their body create plasma cells (B cells) that can produce antibodies against a specific pathogen. (flu, polio, hepatitis)
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Function of Antibodies: Attach to antigens and attract phagocytes which engulf (eat) the antigens
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phagocytes-engulf & destroy bacteria –most WBC are this type “phag”=eat, “cytes”=cell
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Inflammatory Response Pathogens detected Millions of WBC’s produced to fight infection Blood test reveals increase in WBC’s-body is dealing w/ a serious infection Immune system releases chemicals that increase core temperature
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FEVER- INCREASED body temp Many pathogens survive in a narrow temp. range Elevated temp:1) slows down or stops growth of pathogens 2) increase heart rate, WBC’s get to infection quicker 3)Speeds activities of WBC’s & rate of chemical reactions that repair damaged tissues
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1. (10b) Humoral immunity is carried out by A.Killer T Cells B.Lymphocytes C.Antibodies D.macrophages
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2. (10b) In the figure below the red bacterium represents a A.Antigen or pathogen B.Antibody C.Killer T Cell D.Antigen binding site E
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3. (10b) Which of the following is the function of antibodies in the immune response? A.Antibodies produce antibiotics. B.Antibodies attach to antigens and attract phagocytes which engulf & destroy the antigen. C.Antibodies produce interferon.
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4. (10c) When a person receives a vaccine, his or her body creates a memory that A.Receives antibodies against a specific pathogen B.Creates plasma cells that can produce antibodies against that specific pathogen. C.Has polio antibodies in the blood D.Has antipolio killer T cells in blood
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A. Preventing Viruses from replicating D. Growing green mold that stops bacterial growth B. Killing infected cells C. Helping leucocytes identify pathogens 5. 10B Antibodies fight infections by
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