OVERVIEW OF THE IMMUNE SYSTEM
IMMUNITY INNATE AND ADAPTIVE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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intracellular like a virus
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extracellular like a bacterium
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Either A or B
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None of the above
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Detailed explanation-1: -To be recognized by a T cell, the antigen must bind a protein called the Major histocompatibility complex (MHC). Cytotoxic T cells recognize antigen bound to MHC protein type 1.
Detailed explanation-2: -Cytotoxic T cells kill target cells bearing specific antigen while sparing neighboring uninfected cells. All the cells in a tissue are susceptible to lysis by the cytotoxic proteins of armed effector CD8 T cells, but only infected cells are killed.
Detailed explanation-3: -Cytotoxic T-cells, also known as CD8+ T-cells, express their TCRs accompanied by the glycoprotein CD8.
Detailed explanation-4: -Effector cytotoxic T cells directly kill cells that are infected with a virus or some other intracellular pathogen.