Page 510 - Review of Medical Microbiology and Immunology ( PDFDrive )

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mebooksfree.com mebooksfree.com mebooksfree.com (A) The vaccine containing killed hepatitis A virus is best because mebooksfree.com
CHAPTER 57 Immunity
499
3. Which one of the following is most likely to induce an IgM anti-
it induces the most antibody.
body response without the participation of helper T cells?
(B) The vaccine containing killed hepatitis A virus is best because
(A) Diphtheria toxoid
it provides the most long-lived immunity.
(B) Pneumococcal capsular polysaccharide
(C) The serum globulin preparation containing antibodies against
(C) Pneumococcal polysaccharide conjugated to diphtheria toxoid
the virus is best because it provides immunity in the shortest
(D) Tetanus toxoid
time.
(E) Toxic shock syndrome toxin
(D) The serum globulin preparation containing antibodies against
4. Regarding haptens, which one of the following is the most
the virus is best because it provides the most long-lived
accurate?
immunity.
(A) A hapten is the antigen-binding site in the hypervariable region
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mebooksfree.com mebooksfree.com mebooksfree.com ANSWERS mebooksfree.com mebooksfree.com
of IgG.
(B) A hapten cannot induce antibody by itself but can do so when
covalently bound to a carrier protein.
(C) A hapten can bind to the antigen receptor of CD4-positive
1. (E)
T cells without being processed by macrophages.
2. (E)
(D) A hapten is defined by its ability to bind to the smaller of the
3. (B)
two polypeptides that comprise the class I MHC proteins.
4. (B)
5. Certain components of our immune system are characterized by
5. (A)
two attributes: being able (1) to respond specifically to microbes
6. (C)
and (2) to exhibit memory of having responded to a particular
microbe previously. Which one of the following has BOTH speci-
ficity and memory?
(A) B cells
(B) Basophils PRACTICE QUESTIONS: USMLE &
COURSE EXAMINATIONS
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(C) Dendritic cells
(D) Macrophages
Questions on the topics discussed in this chapter can be found
(E) Neutrophils
in the Immunology section of Part XIII: USMLE (National
6. Your patient says that she must travel on business 3 days from now
to a country where hepatitis A is endemic. She just read in the
XIV: USMLE (National Board) Practice Examinations starting
newspaper that there are two types of protection against this dis-
on page 751.
ease: one is a vaccine that contains killed hepatitis A virus, and the
other is serum globulin preparation that contains antibodies to the
virus. She asks which you would recommend and for what reason?
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