Question

1. The first line of defense include all of the following except

(a) mucous membranes and skin

(b) Inflammation and fever

(c) physical and chemical barriers

(d) coughing and sneezing

2. When B cells or T cells recognize an antigen they will eventually make many copies of themselves. Which of the following is the correct order of events?

(a) Clonal selection, clonal expansion, clonal deletion

(b) clonal expansion, clonal selection, clonal deletion

(c) clonal deletion, clonal selection, clonal expansion

(d) binding of antigen, PAMP activation, clonal deletion, clonal expansion.

3. Which of the following is NOT a step involved in phatocytosis?

(a)chemotaxis

(b) adhesion

(c) engulfment and phagosome formation

(d) destruction of microbes in phagosome

(e) Elimination of undigested debris

(f) Opsonization

4. Epitopes or antigenic determinants

(a) are parts of the antibody molecule.

(b) are T cell receptors.

(c) are a portion of antigen recognized by antibody.

(d) may be approximately 10-25 amino acids in length.

(e) are a portion of antigen recognized by antibody AND may be approximately 10-25 amino acids in length.

5. Which of the following class of antibody is primarily found in external secretions?

(a) IgA

(b)IgD

(c)IgG

(d)IgE

6. Skin and mucous membranes are mostly involved in

(a) adaptive immunity

(b) autoimmunity

(c)irregular immunity

(d) innate immunity

Answer 1

1. D. cough and sneezing

2. D. binding of Ag, PAMP activation, clonal deletion, clonal expansion

3. B. adhesion

4. C. are the portion of antigen recognized by antibody.

5. A. IgA

6. D. Innate immunity