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45 Cards in this Set
- Front
- Back
What does it mean for an enzyme to be activated in the coagulation cascade?
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Serine is in the catalytic state, and has cleaved the peptide bond.
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What is prothrombin activated by, and what does it become?
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Prothrombin is activated by Factor Xa and becomes Thrombin.
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What does Thrombin do?
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Thrombin activates Fibrinogen to become Fibrin
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What does factor IXa do?
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It activates factor X to become factor Xa
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What activates prothrombin to become thrombin
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Factor Xa
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What role does tPA play in regards to clots
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The injured endothelium releases tPA, which changes plasminogen to plasmin. Plasmin breaks down fibrin fibers to dissolve the clot.
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What shape is a hemoglobin dissociation curve?
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Sigmoidal
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What effect will an increase or decrease in pH have on a hemoglobin dissociation curve?
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An increase will shift the curve to the left, and a decrease will shift it to the right.
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What will an increase or decrease in DPG or temp do to a hemoglobin dissociation curve?
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An increase will shift the curve to the right, and a decrease will shift it to the left.
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What proteins are important for osmotic pressure?
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Albumin, Lipoproteins, Transferrin, Prothrombin
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Describe and give an example of a left-shift to the O2 heme dissociation curve.
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The curve shifts to the left when examining the lungs, bc they will have a hight affinity for oxygen. This affinity, in a sense, allows O2 to be "saved" for tissues that need it most, and therefore are willing to put out more energy to acquire it.
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What do catalase-positive microorganisms do?
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Destroy thier own hydrogen peroxide.
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How do macrophages and lymphocytes behave differently in inflammation?
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Macrophages kill first
Lymphocytes consider the AA sequence of the pathogen. |
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What is "at fault" in Chronic Granuloma Disease?
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NADPH Oxidase
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What are the three lines of defense against pathogens?
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Physical/Chemical
Inflammation (phagocytes) Immune Response (Lymphocytes) |
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How do T-cells kill a cell infected with virus?
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Stop replication of the virus by forming holes so big that the cell dies.
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What three cell types are involved in early (acute) cellular response to inflammation?
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Neutrophils
Eosinophils Basophils/Mast cells |
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What three cell types are involved in late (chronic) cellular response to inflammation?
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Monocytes
Lymphocytes Epitheloid Giant Cells |
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What type of granules contain myeloperoxidase?
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Primary of azurophilic
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How do granulocytes localize to the site of injury or infection?
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Rolling
Adhesion(selectins and integrins) Diapedese (transedothelial migration) |
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How and where does opsinization occur, and how does it assist in phagocytosis?
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Microorganisms in serum are coated with serum proteins (opsins) typically IgG and IgM or C3a.
Opsinization enhances phagocytosis. |
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How does NADPH oxidase kill cells?
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O2 + NADPH --> NADP + 2O2
O2 gets catabolized into several oxygen species that are lethal for microorganisms. |
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How are the phagocytes protected from being killed along with the microorganism?
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Confinement in phagocytic vacuoles, superoxide dismutase.
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What protein do granules released to the surface contain?
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Perforin (5-10 min later, cell bursts)
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Neutropenia
Leukopenia |
Less than 1,500 neutrophils per cubic mm
Leukocyte count below 4,000 |
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Outline Granulopoiesis
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Granulocyte Progenitor Cells
Granulocyte Precursor Cells Myeloblast Promyelocyte Myelocyte Metamyelocyte Band Cells Mature Cells Neutrophils Basophils Eosinophils |
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In Neutrophils, what do the primary and secondary granuals contain?
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Primary: Myeloperoxidase, lysozyme, acid hydrolases, cationic proteins (defensins)
Secondary: Lactoferrin, lysozyme. |
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List three types of congenital neutropenia:
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Cyclic Neutro
Severe Congenital Neutro Scwachman Diamond Syndrome |
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List three immunodeficiencies caused by defects of adhesion.
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LAD Type 1
LAD Type 2 Rac 2 Deficiency |
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Most of the diseases studied in this paper are autosomal recessive. List the ones that are not:
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Cyclic Neutro -Auto Dom
LAD 2 Rac 2 Late onset IF gamma -auto dom Earlier onset Chronic Gran- X |
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What is the pathway involved in IF gamma and IL 12? What about the feedback mechanism?
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The pathogen induces dendritic cells and macrophages to make IL12, which induces Tcells and NK cells to make IF gamma. The IF gamma induces macrophages and neutrophils to make TNF alpha and NADPH oxidase, which makes H2O2
The feedback mechanism is due to T-cells making IL10 which inhibits IF gamma, T-cells and IL12. |
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Beginning with O2, NADPH, and NADPH oxide, what is the pathway to bleach.
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Superoxide is made, which combined with H ions makes H202. H2O2 combined with Cl- and MPO makes hypochlorous acid (bleach)
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Oral ulcers, gingivitis, stomatitis and cellulitis are associated with:
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Cyclic Neutropenia
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Skeletal abnormalities, exocrine pancreatic insufficieny, and pancytopenia are associated with:
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Scwachmann-Diamond
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Meningitis is assiciated with:
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Severe Congenital Neutropenia
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Infections of the oral/genital mucosa, skin, GI and respiratory tract are associated with:
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LAD Type 1
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Growth retardation, dysmorphic features and neurological deficits are associated with:
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LAD Type 2
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Recurrent perirectal abscesses are associated with:
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Rac 2
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In interleukin 12, interferon gamma defects, the defect is in signaling, and is more severe if:
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Autosomal recessive, onset in infancy.
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Mycobacterium TB, BCG, and t-cell deficiency is associated with:
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IF gamma IL 12
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Catalase positive infections are assiciated with:
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Chronic Granulomas
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Abscesses in lung, liver and brain; soft-tissue infections, facial acne, inflamed nares, and GI/UG obstruction are associated with:
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Chronic Granulomas
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What is myeloperoxidase deficiency?
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The most common defect in formation of fx neutrophil granuals. Often in conjunction with Diabetes Mellitus.
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Bleeding problems due to problems in the clotting cascade, and skin/lung infections are associated with:
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Neutrophil specific granule deficiency.
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Partial albinism, easy bruising, mild MR, and peripheral nerve defects are associated with:
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Cheiak Higashi
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