1202L14 - Chapter 43 The immune system Understand the...

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Chapter 43 The immune system Understand the different levels of body’s response and which are specific Understand the differences between humoral and cell-mediated responses Know the role of B and T cells and why secondary infections are handled faster Know how the immune system is involved with AIDS, auto-immune diseases, viral diseases, cancer and allergies Figure 43.2 An overview of the body's defenses Figure 43.3 Phagocytosis by a macrophage
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Bacteria engulfed by cell membrane Fig. 43.6 Membrane receptors on macrophages respond to proteins on bacteria or vesicle receptors to DNA or RNA from viruses. Figure 43.7 The lymphatic system Bacteria are attacked by white blood cells and macrophages in lymph nodes. Neutrophils attack bacteria in wounds. Eusinophilis attack multicellular invaders like trematodes Body’s defense system 1) Surface coverings (integument, parasite cuticle) 2) Non-specific cellular responses 0. Leukocytes attach bacteria in lymphatic system
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1. Interferon attacks viruses 2. Complement system attacks bacteria 3. Damaged cells produce hisyamine which causes 0. vasodilation 1. increased immune response, 2. more WBC’s to site 3. inflamation 3) Natural killer cells attack viruses by apoptosis Figure 43.8 Invertebrate immune systems Insect blood cells (hemocytes) phagocytize and secrete antimicrobial peptides Produce peptides which either have anti- microbial or anti-fungal activity (Fig. 43.5)
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This note was uploaded on 05/13/2010 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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1202L14 - Chapter 43 The immune system Understand the...

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