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Ch 43 The Body’s Defense. Three lines of Defense: 1. External defenses 2. Internal (phagocytes, inflammation) 3. Specific defense: (lymphocytes) 1 & 2.

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Presentation on theme: "Ch 43 The Body’s Defense. Three lines of Defense: 1. External defenses 2. Internal (phagocytes, inflammation) 3. Specific defense: (lymphocytes) 1 & 2."— Presentation transcript:

1 Ch 43 The Body’s Defense

2 Three lines of Defense: 1. External defenses 2. Internal (phagocytes, inflammation) 3. Specific defense: (lymphocytes) 1 & 2 are non-specific, innate 3 is specific, acquired

3 Phagocytosis (WBC’s) non-specific By Monocytes which turn into Macrophages (long-lived) and also neutrophils Eosinophils natural killer cells Dendritic cells

4 Inflammatory Response: non-specific Basophils and Mast cells release histamines

5 Other non-specific responses to infection: Fever Antimicrobial proteins Interferons: inhibit viral reproduction

6 Pathogen, antigen, epitope (antibody generator) Self vs. Non-self? Blood groups (A, B, AB, O antigens) Lymphocytes: (mature in thymus or bone marrow) Helper T cells: T H Cytotoxic T cells: T c (enzymes, cell mediated immunity) Suppressor T cells: T s B cells (antibodies, humoral immunity) Memory B’s Plasma cells What is specific immunity?

7 http://video.google.com/videoplay?docid=- 7586835408270491809&q=immune+response&total=1621&start=0&num=10&so=0&type=search&plindex=0

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9 Overview video ://video.google.com/videoplay?docid=- 8860381196434790126&q=antibody+immune+response&total=44&start=0&num=10&so=0&type=search&plindex=1 ://video.google.com/videoplay?docid=- 8860381196434790126&q=antibody+immune+response&total=44&start=0&num=10&so=0&type=search&plindex=1

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11 What is the second response like? Immunological Memory:

12 Cell surface markers in T cell function MHC (major histocompatibility complex) “Self” Cell surface proteins, recognized by different T cells Present the antigen to the T cells, initiates helper T cell responses

13 Perforin, cell to cell attack

14 Cytokine (Interleukins) and Helper T cells What is interleukin?

15 Cytotoxic T cells, perforin What is an APC? Why does water rush in when a pore is created by perforin?

16 Effector B-cells Memory B-cells Make antibodies Antigen driven cloning of lymphocytes: Clonal selection

17 Mechanisms of Humoral immunity: ANTIBODIES

18 Antibody structure and function Igs HIV / AIDS Active vs passive immunity Vaccines (pgs. 852-861)

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21 These are slides we did not use this year (2008)

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24 lymph nodes, bone marrow, thymus, spleen

25 Most cells of the body: Macrophages, B cells, nucleated activated T cells, thymus CD4 CD8 Kills the infected cell Alerts B & T cells

26 Perforin, cell to cell attack


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