Question 1

Oral allergy syndrome is caused by:

Accepted Answer

A)   Food allergies
B)   Overproduction of eosinophils
C)   Bacterial infection that stimulates IgE production
D)   Cross reaction between shared antigens on food and pollen D

Question 2

Which of the following is/are responsible for class switching to IgE production in allergic reactions? 
I. IL-5
II. IL-4
III. IL-13

Accepted Answer

A)   I only
B)   III only
C)   I and II
D)   II and III
E)   I, II, and III D

Question 3

During an allergic reaction, IgE binds to Fc receptors on what cell types?

Accepted Answer

A)   Mast cells and basophils
B)   Monocytes and macrophages
C)   Macrophages and neutrophils
D)   Cytotoxic T lymphocytes (CTLs)  and natural killer (NK)  cells A

Question 4

What is the difference between anaphylactic and anaphylactoid reactions?

Accepted Answer

A)   Anaphylaxis causes more serious symptoms.
B)   Anaphylactoid reactions do not involve mast cells or basophils.
C)   Anaphylactoid reactions cannot be prevented and anaphylactic reactions are preventable.
D)   Anaphylaxis is caused by IgE and anaphylactoid reactions are caused by complement.

Question 5

What role does histamine play in allergic reactions?

Accepted Answer

A)   Increases vascular permeability
B)   Stimulates eosinophil production
C)   Stimulates granule release from mast cells
D)   Prevents activation of the coagulation cascade

Question 6

Which of the following could be a potential outcome of an allergy-induced increase in vascular permeability? 
I. Edema
II. Hypovolemic shock
III. Smooth muscle contraction

Accepted Answer

A)   I only
B)   III only
C)   I and II
D)   II and III
E)   I, II, and III

Question 7

The late phase of asthma mainly involves:

Accepted Answer

A)   Vasodilation
B)   Inflammation
C)   Anticoagulation
D)   Bronchoconstriction

Question 8

Which of the following is a true allergic reaction? 
I. Latex allergy
II. Cockroach allergy
III. Radiocontrast media allergy

Accepted Answer

A)   I only
B)   III only
C)   I and II
D)   II and III
E)   I, II, and III

Question 9

Hyposensitization therapy results in the production of:

Accepted Answer

A)   IgA
B)   IgE
C)   IgG
D)   IgM

Question 10

The radioallergosorbent (RAST) assay is used to test which individuals for allergies?

Accepted Answer

A)   All individuals get a RAST test
B)   Individuals younger than the age of 12
C)   Individuals who are at risk for anaphylaxis during other types of testing
D)   Individuals who have had no response to previous allergy testing but still appear to have allergies

Exam 15: Immediate Allergic Reactions