CTLs Mediate a Powerful and Lethal Immune Response to Infected

question 15

Multiple Choice

CTLs mediate a powerful and lethal immune response to infected host cells.Which of the following steps is NOT involved with CTL activation and function?

• A)Antigen presented with MHC class I is recognized by CTLs.
• B)APC presentation occurs to both T_C and T_H cells.
• C)Fas-FasL signaling pathway is activated, triggering apoptosis.
• D)Histamine is released from cytoplasmic granules, recruiting macrophages to the site of infection.
• E)Perforin and granzymes are released, triggering apoptosis of infected cell.

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