reticular fibers
DESCRIPTION
Reticular fibers. Overview. Cytotoxic T cells. B Cells. Antigen Presenting Cells. Helper T cells. Activate. Help Activate. Help Activate. Cell mediateted immunity. antibody mediateted immunity. - PowerPoint PPT PresentationTRANSCRIPT
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Reticular fibers
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Fig. 14.1
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Activate
Helper
T cells
B CellsCytotoxic
T cells
Help Activate
Help Activate
Cell mediatete
d immunity
antibody mediatete
d immunity
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Figure 2. Activation of naive T-cells requires two independent signals. The binding of the peptide:MHC complex by the T-cell receptor and, in this example, the CD4 co-receptor transmits a signal (signal 1 indicated by arrow 1) to the T-cell that antigen has been recognized. Activation of naive T-cells requires a second signal (signal 2 indicated by arrow), the co-stimulatory signal, which is delivered by the same antigen-presenting cell (APC). From Janeway CA, Jr., and Travers P. Immunobiology. 2nd edition, 1996, pp. 7:8, with permission from the publisher, Current Biology, Ltd, London.
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Cellular interactions involved in induction of immune responses. Activation and proliferation of TH cells. (a) is required for generation of humoral response (b) and cell-mediated response to altered self-cells (c). APC = antigen-presenting cell; Ag =
antigen.
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http://highered.mcgraw-hill.com/sites/0072507470/student_view0/chapter22/animation__t-cell_dependent_antigens__quiz_2_.html
http://highered.mcgraw-hill.com/sites/0072507470/student_view0/chapter22/animation__cytotoxic_t-cell_activity_against_target_cells__quiz_2_.html
Helpful animations
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Helper T cells 1 & Helper T cells 2
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T independent imm unity T dependent imm unit yH elper T cells no t invo lved
A ntigens are usually lip ids o r carbohydrates
No m em ory cells m ade
D evelops after age 2
H elper T cells invo lved
A ntigens are usually pro teins
Mem ory cells m ade
C an occur at b irth
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