Chapter 20 Slide

Chapter 20 Slide - BIO 205 Chapter 20 Aquired Immunity...

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BIO 205 Chapter 20
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Aquired Immunity
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Overview of the Acquired Immune Response
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The Ability to Eliminate Pathogens Requires a Multifaceted Approach Antigens are microbes or microbe parts that provoke an immune response
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The immune systems recognizes unique antigenic determinants ( epitopes )
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Immune deficiency is the loss of the body’s ability to respond to antigens and epitopes Regulatory T cells prevent other T cells from attacking “self” cells. Autoimmune diseases occur when self-tolerance breaks down If nonimmunogenic molecules (haptens) are linked to proteins, they may not be recognized as “self”. Thus they might provoke an immune response (allergies) Immunological memory is the ability to “remember” past pathogen exposures. The body fights off any subsequent infections
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Acquired Immunity Generates Two Complementary Responses to Most Pathogens. B lymphocytes (B cells) are involved in producing antibodies against epitopes T lymphocytes (T cells) provide resistance through lysis of infected or abnormal cells
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activation of B cells production of antibodies against the identified antigen If the microbes enter cells, antibodies are useless. Then, the cell mediated immune response is activated
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This note was uploaded on 04/17/2009 for the course MIC 201 taught by Professor Lacroix during the Spring '08 term at Rhode Island.

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Chapter 20 Slide - BIO 205 Chapter 20 Aquired Immunity...

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