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Exam Key 3 2008
Exam Key 3 2008

... __T___2. Both eosinophils and mast cells are important mediators of allergic responses. __F___3. Most pollen allergens contain a single allergenic component. __T___4. Transfusion reactions are a manifestation of type II hypersensitivity. ___T__5. The initial step in the process of mast-cell degranul ...
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The Structure and Function of Macromolecules

... Structure: Four carbon rings with no fatty acid tails Functions: Component of animal cell membranes Modified to form sex hormones ...
The Structure and Function of Macromolecules
The Structure and Function of Macromolecules

... Structure: Four carbon rings with no fatty acid tails Functions: Component of animal cell membranes Modified to form sex hormones ...
4 dent B cell - immunology.unideb.hu
4 dent B cell - immunology.unideb.hu

... The BCR is responsible for the antigen recognition by the B cell and the activation of antigen specific B cells. Soluble antibodies facilitate the recognition and elimination of the pathogens by the other components of the immune system. (described in more detail at antibody effector functions) Gen ...
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Resisting infection Cellular Defenses: Leukocytes

Chemistry of Life Part 2 (Updated)
Chemistry of Life Part 2 (Updated)

... backbone and three fatty acids. Glycerol is a 3-carbon molecule. Fatty acids are long carbon chains with an acid group at the end. Fatty acids can be saturated or unsaturated with hydrogen atoms.  Phospholipids are similar in structure to neutral fats but have one of the fatty acid molecules replac ...
Click here - The Canadian MPS Society
Click here - The Canadian MPS Society

... (TLR)-4 inhibitor TAK-242. Although TLR-4 receptors serve a critical role in innate immunity by sensing pathogenassociated molecular patterns, TLR-4 receptors have been observed to be activated by various endogenous damageassociated molecular patterns (DAMPs), such as hyaluronan, which induces cytok ...
The Adaptive Immune Response - Emmanuel Biology 12
The Adaptive Immune Response - Emmanuel Biology 12

... Killer T cells • Also called cytotoxic T cells. • Destroy abnormal body cells e.g. virus infected or cancer cells. • Stimulated by cytokines released by TH cells. • Release perforin which forms pores in target cells – this allows water and ions in and leads to lysis of the target cell. • Natural ki ...
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David Emerine Immune system Supplemental Instruction Nov 17

... Histamine results in: a) local vasodilation b) increased capillary permeability So plasma proteins leak into interstitial spaces and cause edema by attracting water osmotically allows for movement of white blood cells out of capillary and into affected area.. 3) Increase number of phagocytic WBCs (n ...
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... • Cytokines can facilitate innate immune function and assist in activation of inflammatory responses • Often referred to as Interleukins ...
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... recognise invading pathogens, the Toll receptors, also recognise "danger signals" from injured tissues (necrotic and apoptotic cells, proteins and peptides) regardless of the trigger: the "danger hypothesis" of MATZINGER [11]. Therefore, a more inclusive definition of immunity is a reaction to forei ...
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PowerPoint Presentation - Atypical Cutaneous Leishmaniasis

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... (Systemic Inflammatory Response Syndrome) • The systemic response to a wide range of stresses. – Temperature >38°C (100.4°) or <36°C (96.8°F). – Heart rate >90 beats/min. – Respiratory rate >20 breaths/min or PaCO2 <32 mmHg. – White blood cells > 12,000 cells/ml or < 4,000 cells/ml or >10% immature ...
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Prescott`s Microbiology, 9th Edition 34 Adaptive Immunity CHAPTER

... a. Both class I and class II MHC molecules consist of two protein chains and are transmembrane proteins in the plasma membrane b. Both class I and class II MHC molecules fold into similar shapes, each having a deep groove into which a short peptide or other antigen fragment can bind c. The presence ...
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... response to infection by pathogenic organisms (virus, bacteria, fungi, parasites), or to vaccination. The enzyme-linked immunosorbent assay ( ELISA) is a reliable and low-cost method to measure antibody response and can be used to ensure that fish are protected from various pathogens in aquaculture ...
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... CD4+ T Cell Activation • If no costimulation occurs when TCR binds to MHC / Peptide, T cell becomes nonresponsive (anergy) or undergo apoptosis. • Only activated APCs express costimulatory molecules. – Thus only naïve T cells in direct contact with APC containing microbial antigen will be activated ...
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Cellular Components of the Immune Response

... What happens if they aren’t replaced correctly? If they are deficient in number? If they are produced in excess to what is needed? If they are not structurally normal? ...
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... – Bacteria such as heliobacter can invade the epithelial lining of the intestine to multiply and divide, then transfer into neighbouring cells without entering the extracellular space where they would be vulnerable to detection. ...
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... with a helical nucleoprotein (NP), and is present in eight separate segments of ribonucleoprotein (RNP), each of which has to be present for successful replication. The segmented genome is enclosed within an outer lipoprotein envelope. An antigenic protein called the matrix protein (MP 1) lines the ...
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Immune Activity Questions:

... Immune Activity Questions: Questions: Attach your individual’s questions to the team’s project. 1. Discuss some of the ways microbes evade the body's immune system. 2. Distinguish between antigen and antibody. Then explain how antibodies and macrophages work together during an antigen-antibody react ...
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

... a) Extrachromosomal genetic element b) protoplasmic outgrowth of donor cells c) small flagella d) special bacterial cilia 3. High frequency recombination cells arise when a) they have multiple F plasmids b) F plasmid has been incorporated into the bacterial chromosome c) conjugation and transformati ...
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What is new regarding the immunotherapy of TB Keertan Dheda

...  High-dose IVIg (treatment of human inflammatory disorders).  Because anti-TNF-a shown to cause reactivation of TB, highdose IVIg was tested in a mouse model of TB to check its safety.  Rather than activating TB, it was found to exert a marked ...
Chapter 43: Immune System
Chapter 43: Immune System

... epitopes on the organism’s own molecules. If these self-reactive lymphocytes were not eliminated or inactivated, the immune system could not distinguish self from nonself. Instead, as lymphocytes mature in the bone marrow or thymus, their antigen receptors are tested for self-reactivity. Some B and ...
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Molecular mimicry

Molecular mimicry is defined as the theoretical possibility that sequence similarities between foreign and self-peptides are sufficient to result in the cross-activation of autoreactive T or B cells by pathogen-derived peptides. Despite the promiscuity of several peptide sequences which can be both foreign and self in nature, a single antibody or TCR (T cell receptor) can be activated by even a few crucial residues which stresses the importance of structural homology in the theory of molecular mimicry. Upon the activation of B or T cells, it is believed that these ""peptide mimic"" specific T or B cells can cross-react with self-epitopes, thus leading to tissue pathology (autoimmunity). Molecular mimicry is a phenomenon that has been just recently discovered as one of several ways in which autoimmunity can be evoked. A molecular mimicking event is, however, more than an epiphenomenon despite its low statistical probability of occurring and these events have serious implications in the onset of many human autoimmune disorders. In the past decade the study of autoimmunity, the failure to recognize self antigens as ""self,"" has grown immensely. Autoimmunity is a result of a loss of immunological tolerance, the ability for an individual to discriminate between self and non-self. Growth in the field of autoimmunity has resulted in more and more frequent diagnosis of autoimmune diseases. Consequently, recent data show that autoimmune diseases affect approximately 1 in 31 people within the general population. Growth has also led to a greater characterization of what autoimmunity is and how it can be studied and treated. With an increased amount of research, there has been tremendous growth in the study of the several different ways in which autoimmunity can occur, one of which is molecular mimicry. The mechanism by which pathogens have evolved, or obtained by chance, similar amino acid sequences or the homologous three-dimensional crystal structure of immunodominant epitopes remains a mystery.
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