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PowerPoint® Lecture Slide Presentation prepared by Christine L. Case
icr o biologyB.E Pruitt ! "ane ". #tein
AN INTRODUCTIONEIGHTH EDITION
TORTORA • FUNKE • CASE
Chapter $%, part &Specific Defenses of the Host:
The Immune Response
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#peci'ic (e'enses o' the )ost*+he Immune esponse
- Innate (nonspecific) Defenses against any pathogen- Immunity Specific antiboy an !ymphocyte
"esponse to an antigen
- Antigen (Ag) A substances that causes the boy to
p"ouce specific antiboies o" sensiti#e T ce!!s
- Antiboy (Ab) $"oteins mae in "esponse to anantigen
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+erminology
- Se"o!ogy Stuy of "eactions bet%eenantiboies an antigens
- Antise"um &ene"ic te"m fo" se"um becauseit contains Ab
- &!obu!ins Se"um p"oteins
-&amma (γ ) g!obu!in Se"um f"action containing Ab
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#erum Proteins
igure $%.2
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+he Immune esponse
- Ac'ui"e immunity Dee!ope u"ing aniniiua!s !ifetime
- Humo"a! immunity Ino!es Ab p"ouce by* ce!!s
- Ce!!+meiate immunity Ino!es T ce!!s
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&c/uired Immunity
- Natu"a!!y ac'ui"e actie immunity
- Resu!ting f"om infection
- Natu"a!!y ac'ui"e passie immunity
- T"ansp!acenta! o" ia co!ost"um
- A"tificia!!y ac'ui"e actie immunity
- In,ection of Ag (accination)
- A"tificia!!y ac'ui"e passie immunity
- In,ection of Ab
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&ntigenic (eterminants
- Antiboies "ecogni#e an "eact %ith antigenic
ete"minants o" epitopes-
igure $%.
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)aptens
igure $%.4
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&ntibody #tructure
igure $%.1ac
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- .onome"
- /01 of se"um antiboies
- 2i3 comp!ement
- In b!oo4 !ymph4 intestine
- C"oss p!acenta
- 5nhance phagocytosis6
neut"a!i#e to3ins 7 i"uses6p"otects fetus 7 ne%bo"n
- Ha!f+!ife 8 9 ays
Ig3 antibodies
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- $entame"
- ;+<01 of se"umantiboies
- 2i3 comp!ement- In b!oo4 !ymph4 on *
ce!!s
- Agg!utinates mic"obes6
fi"st Ab p"ouce in"esponse to infection
- Ha!f+!ife 8 ; ays
Ig antibodies
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- Dime"
- <0+<;1 of se"umantiboies
- In sec"etions
- .ucosa! p"otection
- Ha!f+!ife 8 = ays
Ig& antibodies
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- .onome"
- 0-91 of se"um antiboies
- In b!oo4 !ymph4 on * ce!!s
- On * ce!!s4 initiate immune"esponse
- Ha!f+!ife 8 ays
Ig( antibodies
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- .onome"
- 0-0091 of se"umantiboies
- On mast ce!!s anbasophi!s4 in b!oo
- A!!e"gic "eactions6 !ysis of
pa"asitic %o"ms- Ha!f+!ife 8 9 ays
IgE antibodies
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- *one ma""o% gies "ise to * ce!!s-- .atu"e * ce!!s mig"ate to !ymphoi o"gans-
- A matu"e * ce!!s "ecogni#es epitopes-
Clonal #election
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Clonal #election
igure $%.
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#el'tolerance
- *oy oesnt ma>e Ab against se!f
- C!ona! e!etion
- The p"ocess of est"oying * an T ce!!s that "eact tose!f antigens