Which of the following is the most abundant class of antibody in the blood?

What type of T-lymphocyte, upon differentiation, directly attacks virally-infected or tumor cells?

An immature T-lymphocyte is able to recognize self-antigen bound to self-MHC. What is its fate?

Which of the following is considered a primary lymphoid organ? Select ALL that apply.

Max is bitten by a rattlesnake while on a camping trip. His friends immediately apply ice packs to the bitten area to slow the spread of the protein-based toxin; they then rush him to an emergency facility. What treatment would be given and why? Would this treatment provide immunity against future rattlesnake bites? Why or why not?

What is the importance of negative selection during lymphocyte maturation?

How are B cells activated? Select ALL that apply.

A 36-year-old man enters the hospital in an extremely debilitated condition. He has purple-brown skin lesions (a symptom of Kaposi’s sarcoma) and a persistent cough. A physical examination reveals swollen lymph nodes, and laboratory tests find a very low lymphocyte count. (he is immunocompromised). Information taken during the personal history reveals that he is a heroin addict and has shared needles frequently in the past. 1. What is the man’s likely diagnosis (be specific)? 2. If he has an infection, what cell type is affected (be specific)? 3. How does this explain his symptoms? 4. What is the man’s prognosis (likely outcome of the disease)? 5. Suggest one line of treatment that might improve his prognosis.

Max is bitten by a rattlesnake while on a camping trip. His friends immediately apply ice packs to the bitten area to slow the spread of the protein-based toxin; they then rush him to an emergency facility. What treatment would be given and why? Would this treatment provide immunity against future rattlesnake bites? Why or why not?

Fever is caused due to: