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Published bySusanna Powell Modified over 9 years ago
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CELLS INVOLVED IN THE IMMUNE RESPONSE
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A. HUMORAL LIQUID PART OF THE BLOOD
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1)PLASMA 5% OF BODY WEIGHT MAINLY WATER
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2) SERUM PROTEIN PART OF BLOOD, MORE VISCOUS THAN PLASMA
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a)COMPLEMENT: PROTEINS WHICH LYSE ANTIBODY COATED CELLS
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b)ANTIBODIES: GLYCOPROTEINS WHICH BIND TO ANTIGENS
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B. CELLULAR
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1)PLATELETS: THROMBOCYTES CLOT THE BLOOD
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2) RED BLOOD CELLS – ERYTHROCYTES
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RED BLOOD CELLS CARRY O2 USE IRON IN HEMOGLOBIN
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3) WHITE BLOOD CELLS - LEUKOCYTES
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FUNCTIONS: 1. PHAGOCYTOSIS 2. PRODUCE ANTI- BODIES
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3. CLEAN BLOOD CLOTS 4. KILL CELLS ON CONTACT
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A.GRANULOCYTES GRAINY CYTOPLASM INFLAMMATORY MEDIATORS
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1.NEUTROPHILS: 50 – 70% MOST ABUNDANT 100 BILLION PRODUCED/DAY
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1 ST AT SITE OF INJURY DIAPEDESIS – SQUEEZE THRU CAPILLARIES
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2. BASOPHILS.5 – 1% INCREASE IN BACTERIAL/ VIRAL INFECTIONS
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INFLAMMATORY MEDIATORS – RELEASE HISTAMINE HEPARIN
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3. ESINOPHILS: 1 – 5% INCREASE IN WORMS, ALLERGIES
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KILL ON CONTACT DIGEST EXTRACELLULAR PARASITES
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4. NATURAL KILLER CELLS
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KILL CANCER CELLS FOREIGN GRAFTS VIRUS INFESTED CELLS
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B. AGRANULOCYTES: LACK A GRAINY CYTOPLASM AND ARE NOT INFLAMMATORY INITIATORS
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1.MACROPHAGES 2. 2 – 6% 3. CALLED MONOCYTES IN CIRCULATION
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4. FOLLOW NEUTROPHILS TO SITE 5. ANTIGEN PRESENTING CELL
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2. DENDRITIC CELLS – ANTI- GEN PRESENTING CELL
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COMMON AT MUCUS MEMBRANES
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MAY ACTUALLY PRESENT HIV VIRUSES TO TH CELLS
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3. LYMPHOCYTES: MAKE UP 20 – 30 %
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A. T – LYMPHO- CYTES
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SPEND TIME IN THE THYMUS
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DISCOVERED IN THE 1950 ’ S AND 1960 ’ S MANY TYPES
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1)T HELPER CELLS AKA – CD4 CELLS PRESENT ANTIGENS TO B CELLS
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2)CYTOTOXIC T CELLS – TCYTO AKA – CD8 CELLS
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LYSE CELLS ON CONTACT – THIS DESTROYS VIRUS INFESTED CELLS
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3)T REGULATORY/ T SUPPRESSOR CELL – SLOW DOWN IMMUNE RESPONSE
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PREVENT OVER- KILL
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4)T DELAYED TYPE HYPER- SENSITIVITY CELL
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INVOLVED WITH DELAYED TYPE ALLERGIES – LIKE POISON IVY, METALS
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B –LYMPHOCYTES OR B CELLS PRODUCE ANTI- BODIES
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B CELLS THAT PRODUCE ANTIBODIES ARE KNOWN AS PLASMA CELLS
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USUALLY REQUIRE ACTIVATION THROUGH THE T HELPER CELLS
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