Which immunoglobulins are generally present in pla

ATI RN

ATI RN Test Bank

Which immunoglobulins are generally present in plasma at the highest concentration?

A. IgA B. IgD C. IgE D. IgG

Correct Answer: D

Rationale: IgG is the most abundant in plasma (~80%); IgA , IgD , and IgE are less concentrated.

How many types of antibodies are present?

A. 2 B. 5 C. 4 D. 6

Correct Answer: B

Rationale: Five antibody classes exist (IgG, IgA, IgM, IgD, IgE) ; not 2, 4, or 6.

Which of the following is called the first line of defense in the immune response?

A. Innate immunity B. Acquired immunity C. Passive immunity D. Active immunity

Correct Answer: A

Rationale: Innate immunity is the first defense; acquired (B, D) follows.

Isotypes refer to variations in the:

A. heavy chain constant region B. heavy chain variable region C. light chain constant region D. light chain variable region

Correct Answer: A

Rationale: Isotypes (e.g., IgG, IgM) differ in the heavy chain constant region, determining function, not variable regions (specificity).

Examples of granulocytes include all of the following except:

A. neutrophil B. monocyte C. basophil D. eosinophil

Correct Answer: B

Rationale: Monocytes are agranulocytes, not granulocytes, unlike neutrophils, basophils, and eosinophils.

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