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43. Immune System - 2 B-cell lymphocytes(release antibodies...

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Immune System I. Innate Immunity A. Characteristics of innate immunity 1. Primary defense 2. Non-specific & fast 3. Cellular & humoral components 4. Found in plants, invertebrates and vertebrates B. External Defenses 1. Skin 2. Secretions 3. Ciliated epithelia 4. Mucous C. Internal Defenses 1. Phagocytosis 2. Inflammation 3. Antimicrobial peptides 4. Natural killer cells (kills by apoptosis) II. Adaptive (Acquired) Immunity A. Characteristics of innate immunity 1. Secondary defense 2. Specific & slow (at first) 3. Cellular & humoral components 4. Found in jawed vertebrates B. Major components 1. T-cell lymphocytes (2 types)
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Unformatted text preview: 2. B-cell lymphocytes (release antibodies) C. Antibodies (i.e. immunoglobulins) 1. Found on B and T-cells 2. Recognize foreign objects 3. Millions of receptor types 4. B-cells secrete free roaming antibodies when activated D. Clonal selection & immunological memory E. Helper T-cells 1. Binds to infected cell (via MHC II) 2. Releases cytokines (call for help) 3. Disengages and searches for new target F. Cytotoxic T-cells 1. Binds to infected cell (via MHC I) 2. Induces apoptosis 3. Disengages and searchers for new target...
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