Which One of the Following Is NOT a Mechanism of T

question 4

Multiple Choice

Which one of the following is NOT a mechanism of T cell tolerance?

• A)Inhibition of T cell activation by interleukin-12 from regulatory T cells.
• B)Apoptosis induced by Fas ligand binding to Fas.
• C)Anergy induced by B7-1 or B7-2 binding to CTLA-4.
• D)Anergy induced by peptide-major histocompatibility complex (MHC)binding to T cell receptors (TCRs)without B7-1 or B7-2 binding to CD28.
• E)TCR-mediated up-regulation of Bim or similar pro-apoptotic proteins.

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Definitions:

Sexual Response Cycle

The sequence of physical and emotional changes that occur as a person becomes sexually aroused and participates in sexually stimulating activities, including phases like excitement, plateau, orgasm, and resolution.

Genitals

The reproductive organs, especially the external sex organs.

Engorged

Swollen with fluid or blood; typically refers to body parts that have filled with such to an extreme level.

Erection

The physiological response resulting in the increased blood flow to the penis, leading to its enlargement and firmness.