Chapt 43 notes

Chapt 43 notes - (cytotoxic) Fig. 43-2 INNATE IMMUNITY...

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Chapt 43 - Overview: Reconnaissance, Recognition, and Response Barriers help an animal to defend itself from the many dangerous pathogens it may encounter The immune system recognizes foreign bodies and responds with the production of immune cells and proteins Two major kinds of defense have evolved: innate immunity and acquired immunity
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Innate immunity is present before any exposure to pathogens and is effective from the time of birth It involves nonspecific responses to pathogens Innate immunity consists of external barriers plus internal cellular and chemical defenses
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Acquired immunity , or adaptive immunity, develops after exposure to agents such as microbes, toxins, or other foreign substances It involves a very specific response to pathogens Specific vs Non-specific Specific B cells (antibodies) and T cells
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Unformatted text preview: (cytotoxic) Fig. 43-2 INNATE IMMUNITY Recognition of traits shared by broad ranges of pathogens, using a small set of receptors Rapid response Recognition of traits specific to particular pathogens, using a vast array of receptors Slower response ACQUIRED IMMUNITY Pathogens (microorganisms and viruses) Barrier defenses: Skin Mucous membranes Secretions Internal defenses: Phagocytic cells Antimicrobial proteins Inflammatory response Natural killer cells Humoral response: Antibodies defend against infection in body fluids. Cell-mediated response: Cytotoxic lymphocytes defend against infection in body cells. Immunodeficiencies Acquired Immunodeficiencies-Malnutrition-Disease / promiscuity-Drugs legal and illegal-Lack of sleep-Burns (including sunburns)-Also read in text about HIV/AIDS...
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Chapt 43 notes - (cytotoxic) Fig. 43-2 INNATE IMMUNITY...

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