20. Adaptive Immunity

How are T cell receptors similar in function to B cell receptors?

Which of the following is not typical of an immunogenic antigen?

In opsonization with IgG, why would it be important that IgG react with the antigen BEFORE a phagocytic cell recognizes the antibody molecule?

Why would a person who has their tonsils removed be more susceptible to certain types of infections of the 

throat and respiratory tract?

Indicate the true statements and correct the false statements so they are true.

a. B cells are activated by antigen-presenting cells.

b. T cytotoxic cells are activated by antigens bound to MHC I.

c. Upon activation, T helper cells stimulate T cytotoxic cells and B cells.

d. IgG is the first antibody made during a primary response.

e. T-dependent antigens rely on TH cells to activate B cells.

Select all the false statements about artificially acquired immunity. (NCLEX/HESI/TEAS)

a. It can be passive.

b. It can be active.

c. It may be generated by vaccines.

d. It is a form of autoimmunity.

e. It may generate memory cells.

f. An example includes the transfer of antibodies across the placenta.

Which of the following is the most suggestive of an anaphylactic reaction? (NCLEX/HESI/TEAS)

a. Sudden fever

b. A localized rash

c. Nasal congestion

d. Hemorrhage

e. Respiratory distress

If parents in the United States decline or delay vaccinations for their children because they fear the refuted claim of a link between vaccinations and autism, which of the following is a possible result? (NCLEX/HESI/TEAS)

a. A decrease in diagnosis of autism with a decrease of vaccinations

b. An increase in diagnosis of autism with an increase of vaccinations

c. An increase in the administration of subunit vaccines

d. A decrease in herd immunity

e. An increase in public demand for inactivated vaccines