BIO 203 Lecture Notes - Lecture 26: Cytotoxic T Cell, T Helper Cell, Innate Immune System

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11/23/15: adaptive immunity: two main divisions, 1. Encounter: lymphocytes (b and t cells) encounter antigens and bind to them using specific receptor proteins, not using a prr to recognize a pamp, instead it"s using a, 2. Activated specific receptor: lymphocytes respond to contact-dependent signaling by proliferating and changing gene expression, through secondary messenger signaling, these cells become activated, 3. Attack: lymphocytes kill microbes or abnormal cells, also called neutralization of an antigen, 4. Remember: the second response to a particular antigen is always stronger and faster than the first response, have memory, what distinguishes it from the innate response. Mhc and the antigen: thus t cells requires three things, this process is called antigen presentation, t cell interaction requires, 1. Antigen specific for t cell"s tcr: 2. Ii mhc protein: and moved to display/present it to the interstitial fluid, interaction between the helper t cell and the macrophage requires three things, 1.

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