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Pengkajian
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Immunologi
Studi tentang respon fisiologis tubuhdimana tubuh akan merusak atau
,hidup maupun benda mati, termasuksel tubuh sendiri yang telah mengalami
perubahan.
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Lini Pertama Pertahanan Tubuh The Integumentary System
Skin Mucous membranes
provides a physical barrier preventing
microbial access
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The Invader : Mikroba
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Sistem Pertahanan Tubuh Lain Physiological variables
pH of our environment temperature of our environment
chemical defenses nitric oxide, enzymes, proteins, complement
AND the IMMUNE SYSTEMIMMUNE SYSTEMIMMUNE SYSTEMIMMUNE SYSTEM
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Hematopoietic Stem Cells
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Immune System The Innate Immune system = nonspesifik
a general response to anything other thanrecognized self cells
The Adaptive Immune System = spesifik a specific counter-assault against a known
foreign invader (previously recognized)
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Organs of immune system: Primer Thymus: behind sternum (breast bone)
Immature T cells mature here. 90% diebecause they recognize self proteins
immune system cells
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Organs of immune system: Sekunder
kelenjar limfe limpa tonsil dan
kumpulan limfosit yang terdapat padapermukaan saluran pencernaan, saluranpernafasan, saluran genital, dan saluranurinal.
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What Happens during an infection?
Innate Immunity = nonspesifik injury & infection macrophages slip between cells ( extravasation) to
arrive
Macrophages cytokine chemicals attract othertroops (chemotaxis)
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What are macrophages ? Phagocytic cells -
able to ingest smallforeign invaders neutrophils
monocyte
they release
cytokines thatenhance theimmune response
http://www.biology.arizona.edu/immunology/tutorials/immunology/graphics/mphage2.gi
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Adaptive Immunity: spesifik
There are 2 types of lymphocytes:
B lymphocytes (B cells )
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& migrate to the thymus gland andmature..
T Lymphocytes are
sorted into 3 : Helper T cells Cytotoxic T cells
Supressor T cells
Natural Killer cells(The Third population)
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The second type is: B lymphocytes
B lymphocytes (B cells) - start in the bonemarrow and circulate through the body
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Major histocompatibility complex(MHC) proteins
How does immune system know what toattack?
Proteins on cell surface define self
: n sur ace o most ce s se MHC II: On B cells, T cells, macrophages:
police badge of immune sys.
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Macrophage (gray) approaching a chain of Streptococcus
(yellow). On top of the macrophage is a sphericallymphocyte.
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Natural Killer cell: kills cells that donot have Class I MHC on them
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B cells B is for bone, where they mature. Activated B cells produce antibodies to
invaders epitopes.
ome rema n as memory ce s, rea y ornext encounter w/ a similar invader.
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Antibodies Y-shaped structure Ig G, Ig M, Ig E, Ig A, Ig D
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T cells Mature in thymus (hence their name) Cytotoxic T cells kill infected self cells Helper T cells activate B & CD8+ cells
Suppressor T cells: suppress immuneresponse after infection is over
Recognize antigen only if it is presented incombination with MHC protein on anothercell
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15.20 Main Components of the Human Immune System (Part 3)
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Immune system cells Helper T cells
Recognize MHC II molecules + antigen MHC II molecules actually hold the antigen
. Also produce interleukins
attracts macrophages proliferation of T cells
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Immune system cells Cytotoxic T cells
Recognize MHC I self molecules + portionsof antigen on cell surface.
pores in membrane
Dont attack bacteria: No MHC I molecule Dont attack normal self cells: no foreign
antigen Function: Kill cells taken over by virus
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Penularan Infeksi HIV
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Diagnosis
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