A 25-year-old woman is seen on an emergency basis while in shock, with generalized flushing of the skin and mucous membranes. A tampon is present in her vagina. Toxic shock syndrome is suspected. Which of the following mechanisms is responsible for the toxic shock syndrome?
A. Inhibition of acetylcholine release
B. ADP ribosylation of ribosomal protein
C. Stimulation of G protein
D. Cross-linking of MHC II and TCR proteins
E. Activation of adenylate cyclase
Answer: D. Cross-linking of MHC II and TCR proteins
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Microbiology
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- Clonal selection of B cells ________.
- Fever ________.
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- Innate immune system defenses include ________.
- B cells respond to the initial antigen challenge by ________.
- Which of the following is not a method by which antibodies work?
- Which of the following is associated with passive immunity?
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- The antibody molecule is held together by ________ bonds.
- The primary immune response ________.
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